I'm speechless. This is truly an historic artifact. Just the scenes of the local players are incredibly valuable.
Truly brilliant. I'll be sending this link to people I know in the Vancouver soccer scene for their reaction.
As well as the players you mention, Neil Ellett was prominently featured playing for Vancouver Italia. He was already an established Canadian International by this point. He scored the Whitecaps first ever goal in 1974. Last I heard he is still a referee assessor. He was also coaching Meralomas Womens team a few years ago.
Joe Csabai is a soccer legend in BC. He was the one commenting on the Hungarians vs. Italia at the beginning. His son Rob Csabai is currently a staff coach at BC Soccer. I think he was also in the cafe (Perhaps Cafe Mondial on Hastings near Boundary???) talking with the Italian player about Canada being focused on the recreational game. The footage of the Sun Tournament was extraordinary... perhaps it will inspire someone to start it up again!
I think Kinsmen Stadium burned down and has since been rebuilt - I don't know if it looks anything like that anymore though. Capilano Stadium is now Nat Bailey Stadium and is strictly used for baseball now. The scenes on astroturf, including the part at the end showing Bobby Lenarduzzi, would have been at Empire Stadium.
Please post more if you come across anything!