This is a clip from the following video, which I believe is a re-upload of a Twitch livestream made in 2015:
https://www.youtube.com/watch?v=q4nUK0EBzmI
in which Shawn McGrath, a video game programmer who has worked on many games including the following:
Fortnite
N++
Dungeon Punks
Sound Shapes
Proteus
They Bleed Pixels
demonstrates and rants about why he thinks that Object Oriented Programming (OOP for short) is bad. He demonstrates this by using the Visual Studio 8 C++ debugger to attempt to step through some code written by an extremely intelligent developer named David Eberly, who chose to write the particular implementation of one of his research papers in OOP. Shawn's thesis is that even though David Eberly is extremely smart, the fact that he wrote the code in OOP made it impossible to decipher.
Shawn McGrath can be found on Twitter/X:
https://x.com/sssmcgrath
I believe this is his Twtich:
https://www.twitch.tv/sssmcgrath