how video download works?

[Admini]

PS also, as a feature request, you can add in the browser settings the creation of several video download presets using yt-dlp, simply creating presets in the settings https://i.imgur.com/7MgPjjW.png, or loading from a file (maybe json) as done with loading a custom css style 

Code:

{
   "mp3": "-x --audio-format mp3 --audio-quality 0",
   "merge mp4": "--merge-output-format mp4 {URL_OR_PLAYLIST}",
   "<1080": "-f "bv*[height<=?1080]+ba[ext=m4a]/bv*+ba/b" --merge-output-format mp4 {URL_OR_PLAYLIST}"
}

and in the popup menu make a submenu https://i.imgur.com/rF5Wcaz.png 

OK, we will consider your suggestion.
Generally we shouldn't make a feature too complicated, otherwise it will cause users to be confused.