Danny,
First thank you for all the comments and observations on that Vengeances of 8 Squadron video. it was a delight to go through them . Your analysis of the crew, the ground crew etc bought a smile to my face. I have never observed that the observer was standing up and watching the guy in the front during the start up sequence till i read your post!.
That video is actually from the Australian War Museum collection .. originally from this page
https://www.awm.gov.au/collection/F02561/ and as such was an official film and not someone's personal home film.
As you may have remotely guessed, I was the chappie who decided to download the soundless (and soul less) film, upload it to the bharatrakshak youtube account and annotate as much as I can . I had been eyeing that entry in the AWM Catalog for about 15 years now.. and one fine day i saw they uploaded the video...
My intention is to take all the videos with no names and details and populate it with as much information as i can. towards this I use a feature in youtube called "Annotations". Those annotations wont appear on small devices like phones or tablets, but they do appear if you watch the video on a computer. I have a couple of other 'annotated works' in the bharat rakshak channel. Here is another
https://www.youtube.com/watch?v=QtLwn5sSmsI and one more..
https://www.youtube.com/watch?v=ygVsqTVfpWk
I am very much inclined to take some of your comments and annotate the 8 Sqn Vengeance video all over. it would make it even more delightful viewing!