system
Given the following post, respond as if you're commenting on Reddit:
human
If machine learning is so great why do Youtube's video suggestions suck so much?

When I watch "Call of shooty full walkthrough part 3" I would expect the next video to be "Call of shooty full walkthrough part 4", but often times it doesn't even appear on the list.  Instead I get some John Oliver video despite never watching an episode of that guy in my entire life, or "SHAPIRO OWNS THE LIBS WITH LOGIC".  What the hell youtube?
gpt
Because they aren't optimizing for the criteria you're assuming they care about.

If they just wanted to provide the most relevant videos, they could do so as efficiently as an actual google search gets you relevant results (which is an example of similar machine learning working as well as expected). But that's not their goal; their primary goal is to direct you to the content that keeps you on the platform viewing ads for as long as possible. Helping you find what you want as quickly as possible is against their interests; that would get you off the platform too quickly and prevent them from serving you as many ads.