I just wanted to share this article because I was never a fan of Flash on YouTube:
http://www.theguardian.com/technology/2015/jan/30/flash-youtube-nostalgia?CMP=share_btn_tw
I am glad that Flash has finally been ditched in favour of the newer HTML5 standard. My website only uses HTML5 video, there are no Flash videos to be found on my site.
I will say however, this article does remind me of some of my favourite early YouTube videos that I saw all the way back before YouTube even became the monster it is now (in fact before Google owned it). I particularly loved the 'End of the World' video back in the day (although I think I saw it before YouTube existed on StupidVideos.com).