Sync and Video : Working with Video in Pro Tools : Configuring Video Import Options : Additional Video Import Options

Additional Video Import Options
Gaps Between Clips (Pro Tools HD, Pro Tools with Complete Production Toolkit, and Pro Tools with an Avid Video Peripheral Only)
 
When you import more than one video file into a track, they will be shuffled together by default. This option lets you indicate the number of seconds by which each video clip will be separated when imported into the video track.
Import Audio from File (QuickTime and Windows Media Video Only)
When selected, the audio from the QuickTime or Windows Media video file you are importing will be extracted and placed into new mono or stereo audio tracks in the Timeline. (Mono or stereo audio with a sample rate of 48 kHz or lower are supported.) When unselected, only the video portion of the video file will be imported into Pro Tools.
Remove Existing Video Tracks
When selected, all existing video tracks will be deleted before Pro Tools imports video into the session.
Remove Existing Video Clips
When selected, all existing video clips will be removed from the Timeline and the Clip List before Pro Tools imports video into the session (but left on disk). This option is useful if you want to import a video file into the session with a video frame rate that does not match the current video engine rate.
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See Video Engine Rate for more information.
Clear Main Video Track Playlist
When selected, all existing video clips in the currently-selected playlist on the main video track will be removed from the track before Pro Tools imports video into the session. No other playlists, video tracks, or video clips will be affected. (This option is only enabled if the main video track is selected as the Destination option.)