Add boomerang feature

[Tim284741969zjr]

Would be nice to be able to add with one click a boomerang effect. I.e. the video plays until end and from there plays backwards to the beginning; with an option how often to iterate in total, e.g. 2 or 5 times. Speed should also be adjustable

[seansoss]

But then you have to speed ramp it correctly for it to look good. This is already easy to cut/copy/paste/time-reverse