I went through this ridiculous process to get my green card. I had been working for my company for 6 years with an H1-B visa. I am a smart guy, I get along with everyone in the group, I know the system we work on in and out. I haven't seen the adds they ran, but I wouldn't be surprised if they looked like what's described in that video. Why would the company be interested in firing me and hiring someone else that comes with huge uncertainties and with months of training to get up to speed?
It gets even more ridiculous than what's in that video. Over the years, immigration lawyers have learned what requirements they can get away with listing in the add. For instance, I have a M.S. degree, but they couldn't list it as a requirement because I am not a manager. Of course there is no connection between being a manager and having a M.S. degree, but I guess this makes sense if you posses a lawyer's brain.
There are two things that don't match your story, though:
(1) My salary is not low by any standards.
(2) The company has hired people that responded to these "fake adds", because the scarcity of good candidates is real. They just had to come up with some excuse why the candidate wasn't qualified for that specific job, and then offer him a different job.
It's all a strange dance, where the government knows and understands what the company is trying to do and why, but the government has to keep the appearance of being protecting the U.S. workers. The solution is to stop requiring these ridiculous adds.