Looking for Video Coverage of Salisbury Plains Summer 1941 Canadian Army Tank Arriving

I have a picture of the date when my Grandfather arrived into Salisbury Plains. July 2nd 1941.
In the background is a Movie Truck I would only assume is the BBC or some other UK filming news company.
Anyone know where I could get this video? Anyone know if it could be bought, downloaded or even previewed?

Here is the photo, My Grandfather was in the Three Rivers Regiment, I can't see him in the photo but I know he was in the group at this time.
I'd love to see if I could get a copy of it.
thx
Grandson Enfield