Why no original material?
I read somewhere that no original material was used to make this film. By that I mean the filmmakers did only use archive material and did not conduct interviews themselves for example.
I thought this was a mistake. First, it was not clear at times who the person providing the voiceover was. Not everyone knows Ron Dennis' or Sid Watkins' voice. A collage of different soundbites tells a certain story but unless you know who the person talking is and when exactly that person was making the statement, it can be misleading.
What is more, by merely putting together archive material, we didn't really learn anything new about Senna. It would have been interesting to hear more from Alain Prost (predictably portrayed as the villain again!) or his close driver friend Gerhard Berger how they view Senna and the events from back then today.
The Senna home videos and the FIA archive material (eg, the drivers' meetings) were a nice touch but for those vaguely familiar with Formula 1, there wasn't anything in this film that we hadn't seen or heard before.
A nice documentary nonetheless but one that is more suited to the TV than the cinema, in my view.