your professor probably has the whole picutre on pdf,yet this guy walks you though all these steps none of which are that hard to understand.

mine didn't explain anything

And you still need a degree to get a job

Mine took one whole semester, and yet I wasn't able to catch the basics

My guy just go thorugh everything and his slide explains nothing, and there's no text book that follows his slide, he made up his own homework, and there's no way I can rewatch his class ever again. its so frustrating with this course, this is nothing too difficult and cost me too much time

how long?

Teachers at UKposts teach intentionally, i.e., their purpose is to teach = making the information processable to a variety of human processors (as opposed to making it processable to whomever in the classroom happens to find it clear enough, if there is such a student).

He actually also teaches at the University of Sydney

In lectures, you often have to write and think simultaneously while the professor teaches in front of the class. This task is rather difficult to accomplish for most people because your mind has to multi-task and it become hard to fully conceptualize things in the lecture hall. However, when you are watching videos, you can pause, rewind, fast-forward and learn at your own pleasure which often helps.

- you heard it first time when your professor at university teach. it's new, so difficult. you heard it second time in youtube. it's going to be easier, since you've heard of it. (1st time hearing vs 2nd time hearing) - you were 'forced' to listen the lecture at university. you might be weren't willing. but in youtube, it's you who made the choice to learn. you watch the video because you want to know. (want to learn or not) - in youtube, teacher doesn't need to cater to Q&A of the students. just focus on presentation. in lecture hall, teacher needs to notice/cater to all students responses. - in youtube, you can pause, click backward or forward button. in a physical lecture, you cannot.

This is an almost universal problem it seems

Djiz

Exactly the same way...

The gate he drew is what is known as an X-OR gate, which outputs high when one and only one of the inputs is high.

Use a Karnaugh map or something similar to figure out what's inside the blocks