Why would my ex boyfriend watch break up videos?

I still know all his passwords to everything
We were together for nearly 3 years

So anyway I kind of went into his youtube account
And saw the videos he watched and liked

And some of them were about breakups

E. g. "my worst break up"
"How to pick up girls after break up"
Etc

What the f?
Why would my ex boyfriend watch break up videos?
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