I took many videos on a recent trip. I moved some of the videos to a USB drive designed for iPhones. Most of the videos won't play now

Most of the videos can't play on my computer nor in my iPhone. The media players in my computer display an error message when I try to play them. Is the issue fixable in any way? Who or what would be able to fix them? I really don't want to lose those videos.

I tried to upload a picture of my USB drive designed for smartphones and computers. It kept failing to upload. So, here is a link to the kind I have. I have a blue one instead. It worked well for me until this last transfer.
https://www.amazon.com/...074G17N36/

P.S: This question has nothing to do with the previous question, just in case. This is a different issue and case.

Apple has something called genius bar at some cities, perhaps they can rescue your data.

You probably got a fake capacity drive. It's likely a 4 or 8gb drive with a tweak that fools your phone and computer into thinking it's a large capacity. Reputable ones from SanDisk and PNY run $250, not $28.

The USB device failed or it is a counterfeit 256GB USB produce came from China cheater, because I owned one a few years ago, it has 500GB and I paid high price for it. This counterfeit USB is made from a 2GB USB but contains a small software to fool any device to assume it has 500GB ( or like your 256GB). As I used it to store data, it showed able to store many many GB, but when I played it back, only 1.7GB data was able to recall.
Yours could be worst, chance to recover the videos are slum.

What are their format?
tvs usually play the mp4 format…
you may change the formats with a converter on your pc…

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