A little known extra about youtube, at least, I think it is little known as I have never met anybody who new about it, is that you you can play the "Snake" game on it while waiting for a video to load.
Step 1: Watch a Video
First and foremost you need to select a video to watch. The higher the quality of the video (e.g.. 720p or 1080p), the more likely it is to to load slower then it can playback (for example, it might take it ten seconds to load 5 seconds of the video). This is good. You want it to get stuck, if you see the "spinny circle sign of annoyance and slow internet" then you are fine, if not, go get Dial-Up or something.
Step 2: Play the Game
To play the "Snake" game, make sure you have the "spinny circle sign of annoyance and slow internet". After that push one of your arrow keys (on your computers keyboard) and the game should start. Use your arrow keys to navigate the screen with your "snake" and "eat" (go over with the "snake") the white circles. If the video starts to play, you can keep playing anyway. If you would like to stop playing, then all you have to do is let your snake get to the edge of your screen.