Hi, I've found this solution to play a movie in user document's folder:
let url = URL(fileURLWithPath: path + "/" + filename)
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Please read this
https://developer.apple.com/documentation/uikit/uidevice/1620015-name?language=objc
Close XCode
Disable bluetooth on iPhone
Unplug iPhone
Replug iPhone
Restart XCode
Should be ok now, so enable bluetooth on iPhone.