I fixed an issue with the video rendering where the rendered video would not match what was displayed on the timeline (video would be slightly longer). While I was working on the video code I also made it so you can pause/resume and seek the videos - results in larger files but makes it easier to use.
You can download the patch here: [url=http://www.webpagetest.org/software/wpt_patch_1_8_1.zip]http://www.webpagetest.org/software/wpt_patch_1_8_1.zip[/url]
The full download has also been updated to include the patch.
