Why doesn't Lightroom Classic read .mov files from an iphone properly?

[rogsonl]

I get "There was an error working with the Video" . Is there a missing overlay? A set up I need to do? The same happens in Lightroom CC (just checked). I have an NVIDIA GEForce GTX 1060 3GB video card.

[Ian Lyons]

Have a look at the last post in linked thread All video files in new LR CC classis say "there was an error working with video"

[johnrellis · Accepted solution]

It sounds like you're on Windows. By default, videos created by iOS are in the newer HEVC format, which LR Windows doesn't yet handle: Lightroom Classic and CC: Please support HEVC (H.265) video support | Photoshop Family Customer Comm... .  A workaround is to check the iOS option Settings > Camera > Formats > Most Compatible, which will compatibly encode new videos. You'll have to use a utility to convert your existing iPhone videos to traditional MP4 format to allow them to be imported into LR, or use my Any File plugin as a temporary measure until LR Windows supports HEVC.

[rogsonl]

I got a message that I could download a version of Apple QuickTime and that would resolve the problem. I did, and the problem seems to have disappeared.