While I certainly don't advocate behavior like the lady in the video, as a single parent, I can understand it. Your post doesn't say if your mom was raising you alone, but if she was, you are now old enough to understand some of the pressures she was under. Even if she wasn't single, maybe she had other stuff going on. Hard to tell from your post.
One of the first things you might consider doing is just sitting down and writing her a letter. One that you don't intend to mail. Just vent all that shit out. I know that may sound dumb, but it will help you get clear.
Once you are clear, find out what you would really hope to acheive by a reconciliation. Don't lie to yourself. ;)
After that, if you are comfortable with the answer you've come up with, then try reaching out to her. I'd start with very, very small steps, were it me. That way your emotional investment is smaller.
I wish you best of luck with it. As I get older, I struggle with reconciliation issues, and thus far, have always decided things are best left as they are.