I tried to download some old videos and I get errors. If I export as a video and I get the error unknown (0). If I try to export as unmodified, it downloads as a .mov but then I get an error that it couldn't be opened, the file is not compatible with QuickTime Player. If I try to open the file with VLC, I get macOS cannot verify the developer of “clip-2011-05-30 13;43;17_768C6E17.MOV”. Are you sure you want to open it? and then I get sound only. If I try to use appletv to view it, I get the sound and no video and then in the appletv app, it plays the video but no sound. If I drop the file into vlc, it reduces the file size from 305.9 MB to 27.3 MB as a .m4v file but no sound. I would like to be able to convert them all and put them in shared folders so my relatives can get copies of the videos from all of our family vacations. I am not good at just picking out something from the app store. The advisor said the problem is that the movies are in 32 bit and need to be converted to 64 so that it will play in quicktime (Monterey version). I don't remember receiving any information from Apple that being updating from the last OS, all movies needed to be converted. I have tried iMovie now and it doesn't help me. Any suggestions would be greatly appreciated.