When you enable Content ID matching, YouTube automatically generates claims against other user's uploaded content that matches (portions of) the reference files you provide. Content ID does not claim videos you upload to your channel or to any channels associated with your YouTube content owner.
In some situations, you want to prevent Content ID from claiming videos that particular users upload. For example, a movie studio might not want to claim videos on a YouTube channel that reviews (and therefore promotes) its films. You exempt a channel from your Content ID claims by adding it to a whitelist.
To add a channel to your Content ID whitelist:
Go to the Whitelist from matching page for your content owner.
The page lists the names or external IDs of currently exempted users.
Click the + Add button.
Enter the channel IDs of the channels you want to exempt from your Content ID claims.
The identifier is the username of the channel owner or a custom channel ID. You can find the username and channel ID in the URL for the channel: www.youtube.com/user/username or www.youtube.com/channel/UCxxxxxxxxxxxxx.
To add multiple channels to the whitelist, separate the channel IDs with commas.
The channels appear in the list on the Whitelist from matching page. Content ID will not claim any videos uploaded to these channels. YouTube does not remove any existing claims on videos on these channels.