system
Given the following post, respond as if you're commenting on Reddit:
human
How is adblock plus able to remove the ads that stream before youtube videos?

Also I believe it removes ads that are overlayed on top of the video.  How does it do that?  How hard would it be for youtube to detect and prevent this?
gpt
> How does it do that? How hard would it be for youtube to detect and prevent this?

Adblock programs work by reading the instructions to build the webpage, and telling the browser not to follow certain ones.

To prevent that, YouTube would need to make the ads indistinguishable from other content, to the browser.