I've recently upgraded my live site to 2.4.3-p2 and my development to 2.4.4.
On both sites I am now unable to add YouTube videos to my products. I was able to before. Images all work and Vimeo works fine but not YouTube. When I input a YouTube Url it gets the video data but when I click "Save" it displays "Disallowed file type." below the Url. I cannot find anyone else with this issue. I was able to add videos previously.