TubeLister - Generate a YouTube playlist from your opened tabs.
OrganizeTube - Create video playlists from Youtube, Vimeo and other sources
Tuned Rocks📺 - Discover🔎 curated Youtube videos 24/7
Learnamic - Free and paid K-12 learning resources from hundreds of providers, including educational apps, YouTube videos, online classes, printable worksheets, and more.
Vidlis - Create music playlists from YouTube videos.
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud