Download Optimizer for Youtube APK
Great for creating workout playlists!
A quick search, a few swipes to remove unwanted results and a touch of a button is all you need to save a new playlist.
Results can be sorted by hit count, create date, rating or relevance.
The App lets you choose how long the playlist needs to be and lets you remove search results from the list before you save it. Loads of options like safe search, video length and quality, shows or movies and more.
This application requires a google login and a Youtube account. The current playlist size limit is 50 videos.