I am increasingly worried about the valuable content on YouTube. There are so many old live concerts, useful how-to videos and other cultural treasures amidst all the junk. I suspect that one day, they will make their ads unblockable by embedding them in the video files. I sure hope that some people are downloading the valuable stuff and stashing it away to load onto YouTube's successor.
It skips sponsors (even from the youtuber itself), jingles, intro, etc.
It's awesome.