The first 2 minute video is just Russell Tovey busy signing autographs at the London Film & ComicCon 17th July 2010. The video was shot by David R. Lord. There are more highlights and fan messages at the following posts: No.337 & No.346.
This one is about 6 minutes long. The video was shot by David R. Lord. The last two celebrities are Russell Tovey & William Shatner.