This is the opening from a documentary film by Nicholas Webster (yes, the Santa Claus Conquers the Martians guy)
my wife plays the part of the mother sashquatch, in "Manbeast, Myth or Monster". She's one of the sashsquatches in the opening sequence. This film is slanted, the assumption being that Yeti/sashquatch actually exists, regardless of what your position is on the subject this is not a bad movie, and you get to see Poogie's portrayal of a mama sashquatch. The makeup was done by Greg Cannom and special effects by Rob Botin, Mr. Webster decided that the actors portraying the people and sashquatch/yeti creatures would not be given credit for their work in the film. He said it would lend an air of authenticity to the work, personally, I think it was more about pay scales than any thing else.
It is available in 7 parts on Youtube.
I should also mention the film is from 1979.