Tubufy can search and stream videos for entire playlists or for one song at a time. Simply enter the URI for a song or a playlist from Spotify client and hit the ‘Gimme’ button. All songs from your playlist will be listed in a panel on the left; you can scroll through different songs, jump to another track or shuffle songs.
You can also post comments to any song or playlist using Open ID, Google, Yahoo, Twitter, Facebook and Disqus ID. The service is free and requires no signup or login.