You Will Need:
Step 1: Step One (Opening Your Video)
Once you have your video open find the URL at the top of the screen.
It should say something like http://www.youtube.com/watch?v=NisCkxU544c
Now to add 'keep-' in front of you tube.
It now should look something like this. http://www.keep-youtube.com/watch?v=NisCkxU544c
Hit enter to go to the new URL
Step 2: Step Two (DOWNLOADING YOU VIDEO)
When the web page loads you will see the title pf your video and a image from it.
You will also see many options for downloading.
Since this video is in HD and I want to save it in HD i am going to use the last option.
To save your video simply right click it and click 'Save Link As...'
Then save it where ever desired.
Step 3: Step Three (Enjoy)
And enjoy :)
Thank you for reading this Instructable.