This is, without a doubt, the very best YouTube video download utility in existence today. I have used this add-on for quite some time and I always recommend it to my friends and clients (I am a volunteer support tech in my community). This add-on is well designed and meticulously maintained by one person who fixes every bug in a timely manner. When YouTube occasionally breaks this add-on, the add-on is quickly updated to address the issue. I have supported this effort by buying the pro edition upgrade and I encourage everyone who uses it to do the same. This add-on is a true gem worthy of our support.