If you're trying to create some syncing effect by playing the videos simultaneously, then that's getting lost because of buffering.

The Network + post rock mashup was awesome.

Unfortunately, there was some stuttering, which kind of killed the effect.

Wow, that speech from Network is fantastic.

What is the difference between this and the playlist in YouTube itself?

I recently discovered youtube playlists. I like it a lot but hate the ads. Does this solve that in some way as well?