Vegas does not allow to import tracks. You can copy events, copy track effects (by using preset chains).
Track Motion keyframes – only by hand, track by track…
FYI, Vegasaur allows you to copy/paste tack motion keyframes from multiple tracks (w/o opening Track Motion window, directly from timeline)
> “Why it doesn’t simply rename it I don’t know but it does require that you have twice the space you need on your target drive otherwise it will crash”
Handbrake creates ultra high compressed H.264 video files, for delivery, not for editing,
so edit your original files and then use Mainconcept renderer with one of the “Internet” templates (or Video4YouTube as an alternative)