TL;DRYouTube Music appears to be testing a new feature that allows users to search within playlists.The feature was spotted on the iOS version of the YouTube Music app, and its rollout seems to be extremely limited as of now.Android users are not yet seeing the feature in their apps.YouTube Music appears to be quietly rolling out a long-requested feature — the ability to search within playlists. Users have been asking for this feature for years, and it now looks like Google is finally responding.