system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come other websites prevent you from watching videos when AdBlock is installed, but YouTube/Google does nothing?
gpt
They calculate that it's better to let you watch the video and potentially share it with other people who do watch the ads, rather than stop you watching at all.

Other sites believe that their content is so compelling that you'll still watch if they force you to turn off ad blocking, or they just care less because their traffic is less dependent on their videos being shared and going viral.