Sure, there are a couple of buttons I can press to stop the video. Why do I have to? Find me one person who likes auto playing videos. The page was created with a deliberate annoying choice that I have to go out of my way to override.
I'm not talking about pausing the video after it starts playing. I'm talking about a global setting to prevent videos from playing before you manually unpause them. Safari has such a setting, for instance.
If you don't configure your software when you first start using it, I don't know what to tell you. This shouldn't be "out of your way". You should have set this when you first started using your browser. If you didn't for whatever reason, don't be surprised when autoplaying videos exist.
Dunno man, NOBODY likes auto playing videos, yet creators keep using them for reasons unknown. This is starting to sound a lot like victim blaming. Auto playing videos should not exist, period. End of story.