I've created an e-learning course on my windows laptop. I would like to convert them so I can use them for projects in iMovie. Can this be done?

As far as I can tell, iMovie supports MP4 files in the H.264 format [among others], so it seems like it should be doable. Since that format is common, you may be able to just import your files without needing to convert them -- worst-case, there should be plenty of video format conversion programs/apps that could handle any conversion needed. https://support.apple.com/en-us/HT209029#supported_formats I've also attached a link to a basic iMovie course to this thread -- there's a section on importing, maybe there'll be something of use in there, or maybe an iMovie user [I'm really an audio guy] will chime in..