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.
Why do you think the author of this piece, to who you originally replied, has any control over this?