
YouTube is testing a way to prevent users from watching videos without ads. This is a pop-up window that interrupts the video and displays a timer indicating when the next ad will play. Users would have to accept ads on YouTube or subscribe to YouTube Premium in order to remove the pop-up.
YouTube seems to have 2 main reasons for doing this. One is to convince these users to switch to the Premium service, which offers more benefits in addition to removing the ads. The other is to ensure that content creators are compensated for their work and that advertisers have greater reach.
Advertisers will have to be more careful not to over-saturate users, as they may be annoyed by the constant ads, and it may affect their user experience, and end up affecting the performance of campaigns.
Some users might look for other ways to watch YouTube videos without ads, such as extensions to download them, but YouTube says it is also combating these practices. On the other hand, I don't think this practice would be a big concern for advertisers and creators, since downloading the videos seems to be more tedious than simply watching the video with ads.