Vintage saw sharpening machine working - GIF

[C Tucker]

I have 3 of these filers. I gave up playing with them when I needed to wear glasses to read, and the price of a new hand saw was less than an hours labor.
Evidently,he didn't read the book on how to file. The feed pawl, is supposed to push on the tooth you just filed. He is also just gumming out the saw because the file isn't at an angle and he's hitting every tooth.
This is the first step in 3 steps to sharpen a hand saw.