Just like photos, you can use a voice action to start video recording by saying "OK glass, record a video".
You'll see a live view on your display of your current recording and a time counter for your video recording. Videos are 10 seconds in length by default. To continue recording, tap your touchpad and select Extend video. To stop recording, tap the touchpad and swipe to select Stop recording.
Use the physical camera button as a shortcut by holding it down for one second to start recording. Press the button again while recording to extend the video. Pressing the button while recording an extended video will stop the recording.
View and share your videos from your Glass timeline or your Google+ Auto Backup album.
- Learn more about recording videos.