Starting with Edition 305, all the mp4 files should be downloadable by left clicking on the download link, and then choosing “save video as” after the stream appears. The mp4 files on the site do not stream before Edition 305 at least in general. Those are the ones that can be downloaded with download plugins for your browser such as Video Downloader Professional for firefox or Flash Video Downloader for firefox.If you are using a phone, you must download the older vids before Edition 305 that do not stream with a downloading app such as Total Files for ios:https://apps.apple.com/pk/app/total-files/id557285579 or this for android:https://play.google.com/store/apps/details?id=com.dv.adm&hl=en_US&gl=US. You can also download with a phone using the download feature that comes with Firefox. Firefox is now available for android too. It may have the downloading feature in the android version as well. The reason why Mov files are available for, I believe, most of my older videos, is to provide streaming for phone users since those mp4 files are different from the more recent ones and do not stream.