I agree with some of the reviews here that the narration was awful.
There's nothing wrong with an Irish accent, unless it's delivered by a pretentious bore.
Why did Cousins think Welles fans would be interested in listening to his opinions for 2 hours? It felt like 3. The documentary was advertised as a look at Welles' art work. OK, we see a lot of it, and it looked like there was more. We see Welles' daughter, and when she started to talk, Cousins cuts in and ends a potentially interesting part of Welles' life. I cannot recommend this to those who want to see a good documentary.