How to save You Tube videos to your computer

I wanted to show a You Tube video on my computer recently in a place that didn't have internet access and I wasn't sure how to save the video to my computer. I found this great, free site called Keep Vid. I was able to save the file to my computer within minutes. You simply paste the You Tube url into the box that says "URL" at the top of the page and then click "download." It then gives you options of what type of file you want to save as. I chose the "mp4" option. That is it. Pretty easy.