Sync and Video : Working with Video in Pro Tools : Using the Video Window : Scrubbing the Video Track

Scrubbing the Video Track
Due to the latency introduced by all FireWire-based video peripherals, the video on an external monitor will not be in sync with the Scrubber tool. To scrub video without latency, you can scrub in the Video window.
If you scrub directly on the video track, only the video will scrub (no audio will play). If you scrub on an audio track, audio and video will scrub simultaneously.
To scrub a video track:
1 Ensure that scrubbing in the Video window is enabled by selecting Options > Scrub in Video Window.
2 Select the Scrubber tool.
3 Click in the video track and drag the Scrubber.
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To scrub with finer precision, press the Command key while scrubbing.