Yes, you can add videos to your eBay listings by simply pasting the HTML code into the description editor. Note: you must use an approved video-hosting site (such as YouTube or Vzaar) and follow eBay's guidelines for videos.
See eBay's help page about the topic here. Good luck!
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .