Christopher Sykes’s excellent BBC Channel 4 documentary The Making of Lolita (1989), with VN, VéN, DN, Martin Amis, A.S. Byatt, lepidopterist Charles Remington and yours truly, has been posted on YouTube.
It still seems the best VN documentary since those made while VN was alive (of which the 1965 Robert Hughes film is still my favourite).
Brian Boyd