Captions for Recorded Classes

We've been recording our classes held over zoom, but since there is about fifteen minutes of filler time before each class begins, I've been editing them down on Vimeo. However, some of our students are hard of hearing, so I've been trying to add captions. The issue is when I use a Zoom caption file with an edited down video on Vimeo, the captions won't sync, rendering them pretty much useless. If anyone has any suggestions on how to get captions to sync on an easy-to-use platform, I would greatly appreciate it!