I hate flash. It’s taking a very long time dying but it needs to die. Sadly there are a lot of amazing websites that use it. Fortunately I found a quick trick to watching youtube videos from the terminal. This requires youtube-dl and mplayer. Both should be in most major Linux distros repositories.
The key tags are the “-g” that prints out the actual video location for mplayer and “-f 22″ is an optional tag for selecting the quality / codec Without this tag it will load the highest quality video. You can find a complete list of format tag numbers on the YouTube Wikipedia page.