Inneractive videos

Hi All,

I have a question. I’m trying to figure out how people are making these inneractive videos. I see them a lot on The FWA and there is also one on: http://innovid.com/ I’m just trying to understand what’s going on there, how does the video detect a mouse event etc. Can someone explain that? I do a search for inneractive flash movies and I get some random stuff that I’m actually not looking for.