If I'm using a loopable jumpback and it's not long enough, I remember that there is a way to repeat it x number of times. I just don't remember how to do it. Any help on this would be greatly appreciated.
If it is loopable simply repeat. To make any clip loopable that is not, you can add edit in the middle of the clip, move the front half to after the back half, trim the original beginning and original ending that are now joined to allow a dissolve (greatly depends on the footage) that hopefully makes the transition "seamless". you then have a clip where the new beginning and new ending are perfect frame matches that can be repeated.