Looking for footage of the WW2 British Churchill tank climbing hills

[Bulo]

Wasn't sure where to post this thread, so I apologize if this is out of place. Basically, the Churchill line of heavy/infantry tanks were renown for their ability to surpass essentially any incline. Unfortunately, I can only seem to find snippets of real footage of said tanks in action, in old documentaries with no real "sources". I'm just wondering whether anyone here would know where to go to view such footage online. Hopefully I'm not the only one interested in this subject! Thanks.