I don't know what good any such petition will do, but for the benefit of Beatles fans worldwide seeking digital release of the acclaimed Beatles film "Let it Be" there is a website dedicated to that cause:
http://www.ipetitions.com/petition/letitbeondvd/
Wonder if the reason LIB has not been released by Apple Films, (since the VHS format days) is that, perhaps, maybe the surviving former Beatles aren't happy with the way they might have been portrayed or perceived in the film ?

Of course there have been excerpts from LIB released in various media, such as videos of Get Back and Don't Let Me Down from the Rooftop concert and also the Beatles Anthology film had a segment on the Rooftop concert included.
And many bootlegged copies in DVD format are out there, since Apple has not released an "official" version.