OMG...that Video was AWESOME! :)
I saw that at a film festival in the late 60's, the whole film. It really captured that skateboard ethos, which started in the early 60's. IMBD has a link to a distributor in the comments where you can order a DVD.
I should fess up- I found this one from Professor Batty! Thanks for posting a link from your blog. It's awesome.