If you want to edit XAVC files in iMovie, this article will offer some useful tips for importing XAVC to iMovie by converting XAVC files to iMovie compatible formats
A guide about how to convert Flash SWF to QuickTime MOV video on Windows PC with SWF to Video Converter. It can help you change Flash SWF video to MOV breezily.
If you have trouble in converting SWF to MP4 or want to convert SWF to MP4, you can refer to this detail guide here showing you how to do this task via using a great SWF to MOV or MP4 tool on Windows or Mac.