I have been browsing Veeky Forums for a while but holy shit am I taken back by the absolute stupidity in this thread.
For starters. Alex Zenardi had his legs amputated by the crash. Those are his legs you see in the photo. His body above the knees was not damaged.
As for the youtube video. People sample movies, TV, whatever to make highlight videos on youtube. OP is asking for what movie or doccumentary the guy on youtube pulled those clips from.
F1 broadcasts were not orginally shot on flim, they were broadcast live, dumbfucks. Somebody had to go out of their way to shoot on flim. Somebody got access to that flim and digitally captured it to make some doccumentary.