Go to youtube.
Find a scooter video you think will be good.
Copy the link
Go to downloadyoutubevideos.com
While it is downloading go to google.com
type in the search bar iSquint
click on one of the links
download isquint and get the application running
now the downloaded youtube video icon should just look like a blank piece of paper. But click on the name of the file and change the name of it to whatever you want but make sure to end it in .flv THAT HAS TO BE THE FILE FORMAT. Now that your youtube file ends in .flv drag the file into iSquint and convert it. It will do the conversion for you. You just select what you want for the file.
Now you have a video for mac that you got off youtube. Enjoy.