After some more work, I was able to remove the main (candlestick) stock chart from the Stock Chart "Multiple Panes" demo to try to get the Navigator to work with video, but it seems that the smallest unit of time that works correctly is 1 minute. I altered demo data to come up with this:
1 Minute or Less test
And it seems that the Zoom event (Mousewheel) handles time in seconds or less but it's not reliable with units less than a minute.
I know it's a Stock Chart, but that Navigator is very cool. Modifying a range slider to add a series of chart data would be a lot of work, so if you can help me get seconds (or milliseconds) out of this bad boy, I'd appreciate it!