Mark Brown is the popular host of Game Maker's Toolkit on Youtube. I like how he edits sources into his video. If you take a look at his StarFox video you can see how he does it at 00:13 and 11:20 where he overlays an article and a twitter post into his gameplay:
He can even highlight lines in the article. My question is how does he do it? What editing tool is he using? How can I do it with Sony Vegas Pro 12?
Additionally if any of you guys could explain to me how he gets his 'Game Maker's Toolkit' logo to slide in and out of the middle of the screen at the start of his videos then it would be appreciated.