This is insanely fast, I'm getting tempted now to dig more into Node.js
I'm a little surprised at how fast it is though--I think it's mostly due to the fact that YouTube returns API requests really really quickly and Angular does a good job of reacting quickly, plus I'm not using jQuery or anything besides Angular that could slow things down.
I did earlier a similar project in django that converts youtube music into mp3.
I will give angular a try in my next version
Thanks