Quoted By:
What happened is Cartoon Network itself is slowly losing relevance like every other cable network because of on-demand streaming. Rerun ratings were going down the shitter since people wouldn't bother watching a show they sort of like when they could be watching any other show in existence. In response, Cartoon Network has converted into a TTG on-demand channel, because it's popular and pulls numbers. This way, Cartoon Network is able to maintain itself until premiers of new episodes, which are the only things that matter to them with the new business model.
I bet whoever made that video probably watches reruns of Steven Universe online whenever he feels like it.