> To playback an mp4 file you need to have it wholly (please correct me if I am wrong) You are. By default, many tools put the meta data of mp4 files at the en

> To playback an mp4 file you need to have it wholly (please correct me if I am wrong) You are. By default, many tools put the meta data of mp4 files at the end of the file which means you have to have the whole file before playing. However, such mp4 files can be "fixed" using tools like this: https://github.com/danielgtaylor/qtfaststart https://github.com/danielgtaylor/qtfaststart