Windows 10: Some .mov files has no thumbnail displayed and they cannot be played with any program w/...

1. Dumping files off of iPhone and iPad. It started out fine with thumbnail seen for all files on both devices2. When organizing the files, thumbnails stopped showing for some .mov files3. Those without thumbnail would not play, no matter what program I use VLC, Windows media player, Movies & TV, Quick Time4. After checking/looking around, restarting computer, etc., some began to show thumbnail, then they became playable5. But no luck for the rest, and same applies to many old files6. Randomly thumbnails for the working files may suddenly become invisible or blank. same would spread to o

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Editing .mov files

Ive never worked with .mov files. What a free program and best program to work with .mov files on a PC?

Thanks

 

.MOV file will not play

You have 2 options:

1. Download and install Quicktime Player to play .mov: QuickTime 7.7.9 for Windows OR
2. Download and install Handbrake: HandBrake: Open Source Video Transcoder and convert .mov file to another format such as .avi or .mp4 then you can play with VLC or with Movies & TV App that came installed with Windows.

 

.MOV file will not play

My daughter sent a message to my wife’s IPad, that contained a .mov file of the junior school concert items a grandson took part in, from her IPhone. I wanted to listen with better volume and sound, so we the file to an email to me: File name IMG_nnnn.MOV.
I detached the file and tried to play it unsuccessfully. The default player could not playback as the file was unrecognised or corrupt and quoted error 0xc0036c4. VLC and Media Player also did not oblige, and a third program mentioned in a very old thread reported the file existed but there was no video.
As the file played only a few minutes ago on the IPad, I am confused why it will not play on my desktop.
Suggestions and possible solutions, please.