Removed unknown thumbnail creation issues

*NOTE: ffmpeg behaves differently on Linux vs Windows. When
VideoTools.scala runs the code "process.waitFor()" on windows, it will
not finish until play is stopped. Not an issue on Linux.
Fullscreen Fix
Fix Fullscreen for safari

Needed to add resize event so that it correctly resizes safari after
Force file downloads on download links.

Instead of opening the link in a new page. Falls back to opening in a
new page in unsupported browsers.
Reactivate the transcript sync button.
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