Citation from "There's a Lot to Miss About the Jungle", Off The Map (TV), Season 1 Episode 13 (2011) censored in hope of resolving Google's penalty against this site.
Citation from "Failure is Not a Factory-Installed Option", American Dad! (TV), Season 2 Episode 3 (2006) censored in hope of resolving Google's penalty against this site.
Definitions include: Channels on YouTube who are desperate for subscribers and popularity (just for the sake of popularity), so they'll tell you to like and subscribe to their channel shortly after one of their videos start. If you're a newcomer and only one minute into the video, you'd barely know anything about the channel or its content, so why would you like the video and subscribe to the channel when it tells you to? Thankfully other channels either ask you to like and subscribe at the end of the video, or not at all because they know you're smart enough to do that on your own.