YouTube.com is a good website where the user can share videos online and other users could watch those videos online initially when I was using I can see videos which is shared by different users nowadays I can see that different TV Channels are also keeping the archive series online which help us to go through the same. Moreover, you can see YouTube as educational site, song site, movies site etc.
As you will find all type of videos at same place and it is also easy to download the same. I have good experience working with YouTube.com as whenever I come across any new thing to learn I go through the YouTube videos which make it easier for me to learn. Up until now I have not found any glitch working with YouTube.