I've done something similar in the past with Spanish, but I found it difficult since I wasn't at the appropriate level for what I was consuming. You really need content that is at your level, or maybe just a massive amount of patience and time.
What the author is basically describing is a poor approximation of an Assimil course -- listening to the audio while hoping some ML translations give them the gist of what's going on. It's probably fine, but it just seems like a lot of wasted effort. With Assimil I've gotten to B1 reading/listening (but not speaking) in a little over 3 months with 30-40 minutes a day, and that's because it's designed to build you up from complete beginner. I'd be curious to know where they're at after 50 days and how many hours they've put in for comparison.