Well, this is my first guide, so it will not be beautiful like the others and maybe not as straight to the point as I would like, but little by little I am trying to improve it.
The reason he did it is because he likes to do tests with champions who have few picks in the jungle, but who are good, like and

First of all, i would like to say that cho 'jungle is a champion that usually doesn’t do so well in high picks, usually I choose him when I’m at least third, because if the enemy team has a very strong early or a jungler that can get in the way, like shaco, I consider another champion, but if you pick cho and noticed that your enemy jungle could try to invade you, use your wards and speak to the team to avoid surprises, also your Ghost Poro will help your early game

Pros:

Good jungling and almost zero chance of your monster been stolen with your ultimate and smite
good cc
true Damage in the ultimate
strong late game

Cons:
Weak early game
bad in 1x1 in the jungle without the ultimate
little map mobility compared to other champions

So you chose cho 'gath for the jungle, I usually start by doing the red, as it combines well with the Vorpal Spikes and make it easy to do the monsters, BUT we have relatively low mobility and we have to farm a lot in the early minutes, so, if you see that you need to gank the top, start with blue, because time is precious for cho' in the early, so when you go to the lane, you need to be assertive, because you will leave the jungle just a little time while you are without your ultimate, so think about wich lane is better now to go.

after doing a little jungle and giving a gank, you go back to the jungle and run to lvl 6, one thing you should avoid is going to the dragon before lvl 6, because in addition to losing a stack of Feast, you exposes yourself a lot, because it takes a long time to do the dragon in the early without the ultimate.

After level 6, you can start your game, do the dragon, and gank the lanes, BUT DONT FORGET TO FARM AND STACK YOUR ULTIMATE, because you’re not that strong yet, you’re starting to grow and start playing from lvl 11, but the more the game goes on and the more you accumulate stacks, the better