Cavan,
If you want to post links in your Craigslist ad, here's a little help:
Youtube videos: find your video on youtube, then click the SHARE button. It should then show "Paste this link into an email or instant message:" with a link next to it (starts with http://). Just paste that link into your CL ad and it will automatically become a working link.
Photos: upload them to a photo sharing service and then past a link to the album or individual photos. I like imageshack.us.