Fantastic. it does what others add on doesn't. I highly recommend this add on. Beware of yourself. I'm a computer grad of over 20 years. today more than 80% users are from the masses. which many don't even know the basics of comps and use the worst thing ever to surf the net, stupid cell phones. if you struggle with the add on or others add ons, the possibility of you being the problem than the add on is higher with those uneducated in computers. REMEMBER youtube is always upgrading their codes to disable these types of add ons. don't blame the add on or developer for youtube antics. since we are downloading material that does NOT belong to us in the first place. keep that in mind, youtube will favor and work for the copyrights' owners not users/fans/etc