Allow tolerating keys that already exist

[nintendoeats]

I would like to be able to ignore the "key already exists" error when adding a playlist. I have a playlist that I would like to sync as both video and audio-only versions. I know I could set up some kind of script that automatically converts to an audio-only format, but this is so beautifully simple already :)

[meeb]

This would currently be quite difficult to add such that it doesn't also impact other people. I'll pop it on the wishlist as I can see the use case but it may be a while. Thanks for the suggestion. There are similar issues already for this so I may merge or close this if it has enough of a duplication.

[nintendoeats]

Thank you!