What is the deal with slot lights?

Never heard of a "slot light" in 20 years of torrrenting. What is it?

You have already posted the same question without explaining what you mean.

Because it is a CAM copy made with a camera pointed at a screen. This will be replaced by a HD copy when one becomes available. Then you can watch it streamed in high def quality and without the annoying slot lights on the screen. Be sure to have Ublock Origin extension running to prevent pop-ups and porn ads.

I've just recently ran into a new company advertising besides slot lights and it made the movie unwatchable. Slot lights will usually throw in 2-3 ad breaks which really annoy me because the audio levels are always pumped way up and it breaks the immersion in the narrative, followed with scattered smaller banner ads littered throughout the run time.

This new company slapped a huge banner ad that takes up 1/3 of the screen that's present during the entire run time. Just insane when it comes to marketing because I can't even remember the company and made me switch off. VPN + torrent will be a blessing when I can find better versions and get off these streaming sites that just carry them.