I'm not really big on Skype, but maybe I can answer your question about YouTube, as it is a popular video site.
You can create a weekly vlog to send to your CSAs or your PSAs through email. But be creative. Talk about SFI, share some funny stories about the company, or even better...make a web comic. One way of gathering potential PSAs, in my opinion, is to do it with humor. Even though SFI is only a mere business, the affiliates help to bring out its lighthearted side.