Prefix "nn_" to the filenames when downloading Playlists (since it's hard to know the playback order after downloading)

Love 4K Video Downloader!

A lot of times when downloading playlists from youtube, the names don't include the playback order e.g. "00_Introduction", ":01_Project Setup" etc.

It would be great if 4KVD had an option where it would prefix the filename with the playback order taken from a playlist if possible. It would save me a great amount of time scrolling though a play list and renaming the files manually all the time!

Thanks for you consideration!