How do I find a compatible video making app for Minimal theme?

[JeanetteQuillen]

I have been trying to find a video (photo slide show style) making app, compatible with Minimal theme, that allows me to make videos with my product photos and publish the video to my product pages with a thumbnail.  Sounds simple, but the apps I've tried resulted in an error message or produced videos that were not viewable when I previewed the page.

Having zero luck with compatible apps and no responses from apps with assistance.  

Please advise asap!