Refers to the postponement that inevitably occurs when you go to watch a certain video on YouTube, but there are one or more irresistibly-interesting other videos that are offered on the home-page, and so you spend the next 45 minutes viewing those other videos before you finally bring up the one you'd originally gone there to watch (if you can even remember which one it was, of course, after totally saturating your brain wif all of dat OTHER delightful/fascinating/informative content).
When I'd originally brought up the YouTube homepage, I was just wanting to watch a 5-minute instructional-video on how to re-assemble the carburetor on a Weed Wacker after cleaning it, but I ended up spending over an hour at it thanks to YouTube-recommendation-induced delay!