How this works
mixxape works entirely in your browser. You create a playlist by adding YouTube IDs to the URL. Then you can share the URL with others. There are two modes:
Mode 0 — Simple
Append comma-separated YouTube IDs to the URL:
play.html?id1,id2,id3
Since this only requires commas and IDs, it's very lightweight.
Mode 1 — With titles
Add a description and pairs of titles and IDs, separated by dots. Use underscores for spaces:
play.html?1/My_Playlist.Song_Title.jRcTdgzfLrs.Another_Song.2ZrWHtvSog4
You can optionally add an estimated total duration in seconds with ~:
play.html?1/My_Playlist~300.Song_Title.jRcTdgzfLrs