Don't start with easy or hard. Start with what you want to talk about. "Making YT video" doesn't mean shit if you have nothing to say. Start with a topic. There is not a single subject that " requires a whole team". Every subject can be talked about with a smartphone and a decent mic... and a good problem solving mindset

Somewhat seriously...porn.

But completely seriously, the easiest videos to make are a matter of pointing a camera at yourself and talking.

Are you wanting to do skits, commentary, walk through, teaching videos, or something else?

The easiest to literally make something is just talk about things you like while recording it and posting that. Maybe go a bit further and edit it to remove pauses or long silence. That will also be practice for literally everything you do that involves video.

It might not get any attention, but practice is practice and not really slop.

Porn.

To clarify, I'm not suggesting you do it, you asked for the easiest.

Let's plays of your favourite games.

All it takes is time and a charming personality.

Reaction videos I guess, but a lot of people are doing that.

I'm going to define easy as "low budget". In which case I think any presentation style video is going to fit that description. I personally enjoy a lot of Milo Stefan and minimiuteman's videos where they present archaeology topics. It really cheap in that you only need to a few pictures from wiki and camera pointed at your self talking about something. Of course to do this well, you need to really know the subject and how to present a narrative that is interesting.

Whatever it is you can talk engagingly about, unscripted. Following that, whatever you can talk engagingly about, scripted.

Doesn’t matter if you’re actually doing the voiceover; just having the ability means less time setting up shots and editing.

Eat stuff.

Things you can do in one take without much editing.

Eating food.