Bring back "source" name for quality

recent changes has removed “source” for quality name for my uses the easy use text options i get are only “best” and “worst”, here’s an example of full quality options “1080p60, 720p60, audio_only, 160p (worst), 360p, 480p, 720p (best)”, where 720p obviously isn’t the best, if you want to make people believe 720p is the best that’s fine, but please bring back source for the actual source (1080p60 in this case)

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