OBS is great when I want to record precisely, but needs a lot of setting up. I wish there'd be something as easy to use as print screen but for record too. Press button, mark rectangle/select window, press start, record for 5 sec, export as gif/mp4, directly upload to Imgur and save link in clipboard. Would pay money for this.

I have been usin Peek for this. https://github.com/phw/peek

Not perfect, but works.

Sounds like ShareX is what you are looking for, it has these exact functions basically. Although it is Windows only. https://getsharex.com/

Quicktime lets you record all or some of the screen, along with optional microphone audio. Saves to an MP4 file.

On Mac, I've enjoyed kap.

https://getkap.co/

I bought Bandicam for precisely this. Use it every day when making a game to show progress, bugs and features. Just works and is simple.

I've never managed to get OBS to be simple.