YouTube has million of videos which demonstrates in all the fields. Any users in the YouTube can upload there videos and they can organize those videos by creating Playlist. You can create as many Playlist as you want, also YouTube let you to add some others else YouTube videos to your Playlist.
YouTube has provide many facilities to their users. You can access YouTube with your Google account. Once log in to your YouTube account, YouTube let you to upload pictures, videos, you can edit any of your videos and many more.
[*] also read. you can see any videos in HD,
Select an video to add. Click on the Add link on the description part of the video. Once you click on the Add you can see your own playlist is list out there. Select any of the playlist on the list then the video is now added to your playlist.
If you want to create new Playlist then it let you to create new Playlist. Click on the create New to create new playlist and then give name to the playlist then the video will get added to the playlist you have created.