Video recorded as an MP4 either as H.264 or H.265, yet the freemium software DaVinci Resolve can't read it. So I need to convert it to a MOV using ffmpeg. I add my audio track and video track, do some

Video recorded as an MP4 either as H.264 or H.265, yet the freemium software DaVinci Resolve can't read it. So I need to convert it to a MOV using ffmpeg. I add my audio track and video track, do some limited editing, and render it as a MKV file which is huge. Because the file is so large, it takes a while to upload that. So then I have to convert it back to an MP4 with an H.265 codec which then m