I did watch it. If just because Skillshare is indeed a heavily promoted service by many Youtubers.
To be honest, the video is a lot of talk for not much. There is actually relatively little in terms of the overall quality of the courses, or just very vague points.
When you watch this video, what strikes you is that the guy just says a hundred times how Youtube is cheaper and better than Skillshare for learning purposes. It looks like a promotional video for YT more than anything else.
The only point worth mentioning is the aggressive commercial subscription model, making it easy for users to miss the 2-week period (when the free trial period is 1 month) before they get automatically subscribed to the service. It sure is a deceptive practice, althougn it's written in the agreement when you sign up (yes you should read those) and although most subscription-based services actually pull off the same trick, so, not pretty, but not specific to Skillshare. Also he mentions how shaky the 'unsubscribe' can be, and that again is shitty but not specific to Skillshare.
One thing that I absolutely avoid at all costs as much as possible is to give a credit card number BEFORE buying or subscribing to anything. Do not give away your credit card number to get a free trial, and this kind of issue won't ever happen. Of course, they almost all do this. great, they can just f*ck themselves, I won't get tricked. I won't give away a credit card number unless I actually buy something, and a free trial is, by definition, not something you buy.
One competitor that also serves as a sponsor for many Youtubers is Brilliant. I have personal experience with neither, but from the kind of Youtubers Brilliant sponsors, as a preconception I would think that Brilliant offers a better service with higher quality, while Skillshare is a bit like the "Fiverr" of online learning.