Update 2021:
After 4 years of using this plug-in and paying for it, Dishita is still working hard on keeping it up to date. He works very hard and this plug-in is awesome, most of you probably use it for free then moan when YouTube break it, stop leaving him crap reviews, it's not his fault!
If you use it, pay for it, it's really cheap and ensures future development!

Update 2018:
Guys, if you get the MP4 error JUST WAIT, he is aware if you took 30 seconds to read the main site - stop leaving crap reviews just because you expect everything to work instantly after code changes by YT, grow up and wait ffs!

2017:
So good I paid for it, worth every penny even though I don't need it that often - the Dev is a great guy and fixes issues as soon as he can.
Keep up the good work