Don't listen to shakycow. He doesn't know what he's talking about.
Will the film creators most likely post a copyright claim? Sure. But that's where the accuracy of his statements end. We have to remember that content ID is automatic, and as such, physically
cannot take fair use into account, even if the rightsholders wanted to. But that doesn't mean you're just S.O.L.
You can dispute the copyright claim, claiming that it is fair use. 99% of the time, the claimant will either release their claim or let the 30 days expire, at which point, their claim is released automatically.
For example, I recently uploaded a video where I compared The Wizard of Oz to the 2015 video game Fallout 4. When I uploaded it, Warner Bros. put a copyright claim on it. I disputed that copyright claim, and Warner Bros. did the right thing and released the copyright claim less than 12 hours after they originally put the copyright claim on (before the video was even scheduled to go public).
I'll attach three screenshots to prove it.
Now, for the 1% of rightsholders who will maintain their copyright claim on your video, you can appeal the copyright claim. Youtube's own employees actually have a video where they explain how this process works:
Youtube doesn't decide anything regarding copyright or fair use. They only do as they're told when the DMCA takedown notice and counter-notice get filed.
However, companies can be sued for damages if they issue a takedown notice for a video without conducting a fair use analysis beforehand:
https://www.gerbenlaw.com/blog/false-dmca-takedown-notices-ninth-circuit-holds-that-copyright-owners-must-consider-fair-use-before-issuing-take-down-notices/
Now, that's only in the 9th Circuit. However, the 9th Circuit includes the State of California, where a majority of film studios are headquartered. So 99.999999% of the movies you may end up reviewing on your channel are covered by this law.