There's a lot of common patterns, but you have to understand how URLs work. You have to recognize which URL parameters are tracking ones or even just might be tracking. And that means you have to know how they work and that takes a moment.

In brief, URL parameters start after a ? in the URL and are formatted like key1=values&key2=value2. You can't usually remove all parameters because not all are tracking. To further complicate things, URLs can also have an anchor starting with a # character which will be after the URL parameters. You often don't want to remove that (though theoretically the anchor could in fact contain tracking details).

It's often trial and error to see which parameters you can remove. I do this a lot since I write a lot of technical documentation. Clean URLs make the documentation more compact and less likely to break. It's not just tracking stuff, but sometimes you need to remove temporal data that makes a page display data from a specific time when you want it to just default to the current time (etc).

That's terrible advice, you'd just be left with

https://youtube.com/watch

You need the "?v=" and the jumble of letters immediately after.

For example: https://youtube.com/watch?v=dQw4w9WgXcQ

inb4 you get an indignant reply suggesting that carburetor tuning is a must-have skill for absolutely anyone who owns anything that has one

I mean carburetor tuning is a must-have skill for absolutely anyone who has one. Otherwise you can never be sure that you are getting an ideal fuel-air mixture, and the ratio changes over time with the temperature, humidity, seasons, etc. Really, it's irresponsible to not know how to do this if you have a car with a carburetor.