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I'm stuck in a dark hole facing potential loss of important videos. A while ago I transferred some 4k videos from a camera SD card to a portable drive to save for later edit, and foolishly reformatted the card. Now although they show the data size (and file type as MPEG-4 video) they won't play in quicktime (Error 2041 code invalid sample description) or Windows player (cannot play the file) they will however open in VLC player but I need them in Adobe Premiere and when I try import it says 'unsupported format or damaged file'. How can I rescue these important videos? I've tried changing the file extension to .m4v and also to .mpeg and this doesn't work. Many thanks in advance for any help