Alley_Dweller:
What seems to be happening is that there are videos that starting making noise as soon as the cursor touches them. You don’t have to click on them, just touch them. So as you’re scrolling down on the page with your mouse wheel, the cursor brushes up against them and they start to squawk.
This has been discussed before, and I believe the conclusion was that rolling your mouse over ads is considered sufficiently “interactive” as to be acceptable:
Nowhere it is written that all ads will be silent.
Complaint has been made if the ad plays automatically without being touched. But ads that sound off when triggered or moused over, that’s apparently acceptable.