Tools for Showing YouTube Vids
Quietube - Drag the button up to your bookmarks bar and click when you are showing a YouTube video.
Quietube App for Chrome Browser
Turn Off the Lights for Chrome Browser
VideoNot.es - show video on left while taking notes in Google Drive Docs on the right!
YouTube Slow - Slow down (or speed up) your YouTube experience. Good for language learning, modelling, and more!
Tools for Saving YouTube Vids
How to enable "safety mode" (watch video)
Add ?rel=0 to the end of the video's embed URL before embedding it on your site/blog/etc. IT is easy to do right from the YouTube video share area. More info here. In addition, see screenshot here.
10 YouTube Tricks You Should Know
** esp. useful is the trick for "Cut to the Chase and Link to the Interesting Part"
** to go directly to a certain point in the video, you can also pause the video just before the scene you want to show, Right click. Choose "Copy Video URL at current time" and use that link in your site/blog/email/etc.
Adjusting default settings for YouTube uploads (cnet video)