Make sure that you have permission to do this! Carefully read YouTube's advice on copyright issues at http://www.youtube.com/t/copyright_center.
1. Find your YouTube video and copy (Ctrl+C) its web address (URL) as shown in the following screenshot:
2. Go to the website http://mediaconverter.org.
3. Click the icon Enter a link.
4. Paste (Ctrl+V) that video address into the input box, as shown in the following screenshot:
6. Click the drop-down arrow for ---select a file type--- and choose flv. (You could choose another type, such as wmv, but this one will do for us.)
7. Click on Next step and ignore the next page of instructions.
8. Click on Start.
9. Sit back and relax while the site does its job!
10. Click on the download link to download the video to somewhere that you can store it ready for Moodle.