>>1535500mp4 is supported now, just run it through a online converter, alternatively install yt-dlp and download it from there. I'll try my best to make this simple (since it really is, don't let the terminal scare you, it's a good way to download videos).
install choco (run the command found in choco's website to download it)
>run choco install yt-dlp in the terminal as admin>run choco install ffmpeg in the same admin terminalthen
>yt-dlp "youtube link here" that will download the video at max video quality and max audio quality
if it's too big you can do
>yt-dlp -F "link" (uppercase F)that will show you a list of all audio and video qualities, pick whatever you want based on size, for example in pic related the red square contains audio and the blue contains video, i picked 249 for audio and 229 for video so now run
>yt-dlp -f 249+229 "link" (lowercase f)now it'll download, just read the size at the side and you're good to go, hope i made it look easy