Peter's done some research and written a post on the film which includes finding the retailers website, which includes a montage of clips from the film. A different selection of clips are available on YouTube in Farsi (with English subtitles).
One thing Peter doesn't mention is that the film would appear to be primarily based on the Qu'ran. Sura 3 discusses the birth of Mary, including some indications that Israel's deliverer was already expected at that point, and Surah 19 deals with Mary's role in the birth of Jesus. I notice that Aghdashloo declared that "Obviously it's been distorted, it's not the real story" in the interview. I'm not sure whether this is a reference to it being based on the Qu'ran rather than the bible (and if this was the Grace Hill organised event she would have known Peter was a Christian) or just to the fact that padding out either version of the story to fill its incredible 6 hour run time.
Whilst the original is in Farsi it is available to buy in an English dubbed version in a number of different countries (including the US and the UK). There was also a screening of the film last year, put on by the Islamic Centre of England