A certain Andrew "Andy" Tait installed every version of Internet Explorer, right from version 1 to IE9 on various virtual and real machines. It's a really interesting experiment. Andy loads several popular websites and browser benchmarks, which often result in several errors. That's expected, isn't it?
The video really takes you down the memory lane. Andy loads several modern sites that the old browsers were not meant to render. It's sort of like time travel.