I am unable to edit the video and can't find a way to bring the media on-line. I have 12gb of ram but that doesn't seem to cause this issue with any other large video. So far I have determined that it could be that the .MP4 file was recorded in 4K. I used a GoPro Hero 8 Black camera to record it. If not 4K, it seems to edit just fine. Any advice, other than, Don't record in 4K, would be helpful.