it would be cool to have a footage like this.
Numerous A&E documentaries have featured about twenty-seconds of the film. I've come across the clips on Youtube as well. Usually, it's just brief snippets of the push-ups and 1-inch punch, respectively.
I can't remember if the biographical movie with Jason Scott Lee contained any of the clips or not. I distinctly remember them using some original footage from the Kung Fu series, and Ed Parker Jr. appeared as his dad, Ed Sr., but I haven't seen the movie in years.
If you can't find it on Youtube or daily motion, let me know. If I remember, the next time I come across it, I'll forward you a link.