Greentext

A self-imposed deadline of making a new video by the end of every day. And rushing through videos absolutely is good practice for a handful of things. Especially if you've never edited video at all. It gives you practice just in opening the programs needed and navigating them. Even a hastily edited video is still an edited video that the person needed to learn many aspects of the software to edit. Also, seeing a project through from start to finish you quickly learn that there's a lot to do at the end of a project after the creative part.

Some of the most consistent advice from famous creative people is to start out like this. It's well known that starting with a massive ambitious project is a recipe for failure. IDK if you've ever tried to do something like this but it can be very intimidating just to begin if you feel like the first project you work on is personally important to you. Making mediocre videos every day gives you a stress free way to make something creative from start to finish.

I guess they meant deadlines for sponsored videos or something

You'd be surprised how quickly channels die once you stop putting out a video every week, 3 days, or whatever arbitrary number they or the algorithm is used to.