Custom Download template.

[abelokoj-github]

Is your feature request related to a problem? Please describe.
A lot of users will need to add custom download templates that work directly with yt-dlp (youtube-dl) as an examle, I frequently make use of this command
--output "%(title)s_%(upload_date>%Y-%m-%d)s.%(ext)s" --continue --restrict-filenames --ignore-errors -f bestaudio --extract-audio --audio-format opus --audio-quality 32k --ppa "ExtractAudio+ffmpeg_o: -c:a libopus -b:a 32K" --write-subs --convert-subs lrc --add-metadata --convert-thumbnail jpg --embed-thumbnail --write-thumbnail

which converts my output to a different format (.opus audio in this case) using ffmpeg after downloading.

Describe the solution you'd like
Give option for users to enter their custom commands and save it with a different name. that way, when a user wants to download files with audio using certain commands in yt-dlp they can just select say audio opus download which they had saved previously

Describe alternatives you've considered
Check out media-downloader on media-downloader github. it has something similar to what I just described here.

Additional context
Add any other context or screenshots about the feature request here.