It seems the Fly app is unable to transfer any video format, 4K, 2.7 and 1080p when using H265 compression.
The pop up below indicates the app can only transfer 1080p, but this is not true. I do it all the time. I just started seeing this when using H265. Not sure why this would not be supported, since my iPad mini 5 with iOS 13.x handles the video just fine. I suspect it is the Fly app video editing feature that does not support H265, so it refuses to import the video. Direct SD card transfer works fine for the H265 video.
The pop up below indicates the app can only transfer 1080p, but this is not true. I do it all the time. I just started seeing this when using H265. Not sure why this would not be supported, since my iPad mini 5 with iOS 13.x handles the video just fine. I suspect it is the Fly app video editing feature that does not support H265, so it refuses to import the video. Direct SD card transfer works fine for the H265 video.