Create or edit a master video tag manually

A master video tag is a URL used by a video player to retrieve video ads. To assemble a master video tag using the correct URL parameters, refer to the tables below. Once you've assembled the tag, you can test it with the VAST suite inspector.

See sample master video ad tags

A sample video tag, with parameters and assigned values would look something like this:

https://googleads.g.doubleclick.net/gampad/ads?env=vp&gdfp_req=1&output=vast&iu=/1234/video-demo&sz=400x300&unviewed_position_start=1&ciu_szs=728x90,300x250

You can also review and test using these sample tags.

Jump to a specific parameter in the list

Ad tags for live stream video must contain /live in their path to ensure the ability to handle heavy live stream traffic volumes, where all ad breaks are delivered at the same time.

Video Solutions support both https and http. The impressions and VAST tracking URLs respect the SSL setting and will return either https or http as appropriate. Click-through and click-tracking are http since it redirects from another page.

Required parameters

The following parameters are required for all master video tags. Each of these parameters has a constant value. For example, the env parameter always equals vp to indicate that the request is from a video player.

Parameter	Description	Value
`env`	Indicates that the request is from a video player.	`vp`
`gdfp_req`	Indicates that the user is on the Ad Manager schema.	`1`
`unviewed_position_start`	Setting this to 1 turns on delayed impressions for video.	`1`

Required parameters with variable values

The following parameters are required for all master video tags. These parameters have variable values, so please refer to the description and sample values for guidance.

Parameter	Description	Sample value
`output`	Output format of ad. Use `output=vast` for the VAST version (for example, VAST 4) you have enabled for your network. For specific ad tags or parts of your site, you can explicitly ask for VAST 3 with `output=xml_vast3` or VMAP 1 with `output=xml_vmap1`. Use `output=vmap` to return the default VMAP version (e.g., VMAP 1) you have enabled for your network. Note: If your video player uses the IMA SDK, the output parameter for a video ad request will always be set to `output=xml_vast4`. This poses no reliability risk as the SDK is backwards compatible with all VAST versions that any third-party ad server may serve.	`vast` (for your network's default VAST setting) `xml_vast3` (for VAST 3) `vmap` (for you network's default VMAP setting) `output=xml_vmap1` (for VMAP1)
`iu`	Current ad unit. Follows the format: /network_id/.../ad_unit	`/6062/videodemo`
`sz`	Size of master video ad slot. Multiple sizes should be separated by the pipe (`\|`) character. Do not include "`v`" after the size.	`400x300`
`description_url`	The value should describe the video playing on the page. Usually, it's the page that houses the video player, but could also be a page with text that describes the video. You must always url-encode `description_url` on web page video players. You should send non-encoded `description_url` values from mobile in-app video players. This field is required if you use Ad Exchange. Learn more	URL-encoded example: `http%3A%2F%2Fwww.sample.com%2Fgolf.html` Non-encoded example: `http://www.sample.com/golf.html`
`url`	This is the full URL from which the ad request is being sent. On a web page, this is the URL of the page that displays the video player. In an app, this is the package name. If you use the IMA SDK, it sets the URL value automatically. If your player sets this value, the IMA SDK overwrites it and set its own value.	`http://www.videoad.com/golf.html`
`correlator`	A random positive numerical value that is shared by multiple requests coming from the same page view. The correlator is used to implement competitive exclusions, including those in cookieless environments. If the IMA SDK is used, the correlator value is set automatically. If your player attempts to set this value, the IMA SDK overwrites it with its own random value. If the IMA SDK is not used, ensure that you set this value to a truly random value that is not being reused by multiple page views.	`4345645667`

Optional parameters

The following parameters are optional. These parameters have variable values, so please refer to the description and sample values for guidance.

Parameter	Description	Sample value
`ad_rule`	Indicates whether to return a VAST creative or an ad rules response. If you are using ad rules, then `ad_rule=1` should be used. Other requests should use `ad_rule=0` (or simply exclude the parameter). Learn more about ad rules.	`ad_rule=0` to indicate a request for a creative (VAST) `ad_rule=1` to indicate a request for an ad rules (VMAP)
`ciu_szs`	Comma-separated list of companion sizes	`728x90,300x250`
`cmsid vid`	In order to target ads to video content, your master video tag needs to include both `cmsid` and `vid`. The `cmsid` is a unique number for each content source. To locate this in Ad Manager, click Video Content sources and then the name of the content source. The `vid` is a string or number identifying a particular piece of video content. This ID is assigned by the CMS that hosts your content. To locate this in Ad Manager, click Video Content and then the specific content from the list.	`cmsid=[value]&vid=[value]` If you are building a tag for Dynamic Ad Insertion with video on demand, you should use the macros that will dynamically insert the correct `cmsid` and `vid`: `&cmsid=%%CMS_ID%%&vid=%%VIDEO_ID%%`
`cust_params`	Key-value parameters	Learn how to add key-value pairs to an ad tag.
`hl`	The language code used to request ads in that language. This parameter is used for language of ad selection and video ad rendering in dynamic allocation to video in Ad Exchange or AdSense Video. The language can be any ISO 639-1 (two-letter) or ISO 639-2 (three-letter) code. See a list of valid codes. If omitted, it defaults to any language with ad targeting by language in Ad Exchange.	`it`
`msid an`	These two parameters should be applied to all requests sent from mobile app and connected TV devices. The `msid` parameter is the app ID and should be used in direct VAST calls to Google where the IMA SDK is not used. The `an` parameter is the app name. Most programmatic video ads require the presence of both of these values on requests from mobile app or connected TV inventory.	`msid=com.package.publisher, an=sample%20app`
`nofb`	Indicates whether your ad request should not return a playlist of "video fallback" ads. Learn more about video fallback.	`&nofb=1`
`pp`	Control which creatives are eligible to serve based on the configuration set up in a video creative profile. Learn more about video creative profiles.	`pp=video_creative_profile`
`ppid`	The Publisher Provided Identifier (PPID) allows publishers to send an identifier for use in frequency capping, audience segmentation and targeting, sequential ad rotation and other audience-based ad delivery controls across devices. Learn more	`12JD92JD8078S8J29SDOAKC0EF230337`
`rdid idtype is_lat`	With native applications (not on web or mobile web), the SDK passes resettable device identifiers for user targeting into your stream requests with the parameters for `rdid`, `idtype`, and `is_lat`. On SSB streams, you must pass these as explicit parameters, just as you would on a client-side Video Solutions ad request. Learn more Nearly all programmatic video ads require the presence of these values.	See detailed examples of resettable device identifiers.
`scp`	Slot-specific custom parameters	`scp=excl_cat%3Dairline_ exclusion_label%7C`
`tfcd`	Tags an ad request for child-directed treatment. Learn more about tfcd.	`http://.../gampad/ad?tfcd=1&iu=/12345/adunit&sz=728x90&c=12345`
`npa`	Tags an ad request as non-personalized. You must either specifically set `npa=1` or include simply `npa` (without a set value) to tag the request as non-personalized. Ad requests either missing this parameter, or set to `nap=0`, default to personalized ads. Learn more about ad personalization.	`http://.../gampad/ad?npa=1&iu=/12345/adunit&sz=728x90&c=12345`

Custom SDK parameters

The following parameters are the defaults set by the Google IMA SDK. Only include the parameters below in your master video tag if you're not using the IMA SDK.

The current Ad Manager architecture requires that video ad requests include information about ads previously shown in the stream and on the page. This information helps build a picture of past activity while accounting for ad exclusions and duplicates.

SDK parameters related to ad rules and video positions

Parameter	Description	Sample value	Required
`pod`	Represents a pod within a video. Pass `&pod=1` for first pod, `&pod=2` for second pod, and so on. Used for competitive exclusions, frequency capping, and related features.	`3`	No, but must be passed for features such as competitive exclusions, frequency capping, and related features to work correctly.
`ppos`	Represents position within a pod. Necessary for companion autofill. Pass `&ppos=1` for the first position, `&ppos=2` for the second position, and so on. Used for competitive exclusions, frequency capping, and related features. This parameter is for standard pods only.	`2`	No, but must be passed for features such as competitive exclusions, frequency capping, and related features to work correctly.
`vpos`	Indicates whether the ad request is being sent from pre-roll, mid-roll or post-roll	`preroll` `midroll` `postroll`	No
`mridx`	Number-based index that indicates from which mid-roll a request is made (1st, 2nd, 3rd, etc.)	`2`	No
`lip`	Needs to be added for a request from the last position in a pod. This parameter is for standard pods only.	`true`	Yes (for standard pods)
`min_ad_duration` `max_ad_duration`	Taken together, these specify the duration range that an ad must match, in milliseconds. Used to request a single ad.	`15000` `30000`	No
`pmnd` `pmxd`	Taken together, these specify the duration range that a pod must match, in milliseconds. Used to request multiple ads (i.e., pods). *	`0` `60000`	Yes (for optimized pods)
`pmad`	Max number of ads in a pod *	4	No

* These parameters are specific to optimized pods, which are available to publishers with an advanced video package. They also should not be used for VMAP (when ad_rule=1).

Other SDK parameters

Parameter	Description	Sample value	Required
`vpmute` `vpa`	Indicates whether to allow videos that begin in a muted state or videos that automatically play.	To allow both types of videos: `vpmute=1&vpa=1`	No
`scor`	An integer generated for each video stream; the number needs to be the same within a stream and unique within a page view. Used for competitive exclusions, frequency capping, and related features if a user is watching multiple videos on the same page.	`17`	No, but must be passed for features such as competitive exclusions, frequency capping, and related features to work correctly.
`vad_type`	Indicates whether a linear or non-linear ad should be returned for the request	`linear` `nonlinear`	No
`excl_cat`	Ad exclusion category. Blocks any line items containing the exclusion label in question from being eligible for a given ad request; works with `scp` and `cust_params`.	`&scp=excl_cat%3Dairline_ exclusion_label%7C`	No