Apologies, but as an AI text-based model, I cannot access or view specific videos or links. However, I can still provide a general response regarding the Sophia Robot and movie reviews.

Sophia the Robot is indeed an impressive creation in the world of robotics and AI. As for why there aren't more robots like Sophia, it's important to note that developing advanced humanoid robots involves complex technology, substantial resources, and ongoing research.

Regarding movie reviews by Sophia the Robot specifically for "M3GAN," it would depend on her programming capabilities at the time of reviewing it. While robots like Sophia are capable of processing information and engaging in conversations to some extent, their understanding of subjective experiences such as movies might still be limited compared to humans.

If you're interested in hearing Sophia's review or opinions on a particular movie, checking out reliable sources that discuss her capabilities or official channels associated with Sophia may be helpful. Keep in mind that technology is constantly evolving, so who knows what exciting developments are on the horizon for both AI and robotics!