Doing all these tutorials and Im forgetting half of it? :/

It's not just you - the first time it's very much information. But everytime you use your knowledge in Projects, you'll get more familiar with it. But as Guil Hernandez said, even the best Developer doesn't know every property by heart. :)

The most simple tip I can come up with is to do exactly as you suggest. Watch the video again. Everything makes tons more sense once you are familiar with the video and you know what the instructor is talking about.

So to get the best our of the videos:

Watch the videos as many times as you need, practice the code challenges. Do the quizzes multiple times so you not only get the questions right but understand why Write notes on a notepad or text editor (I recommend evernote) as you go along the videos.

Thanks guys :D

Real life practices my friend, projects or on code pen plenty of time on them, and when studying or rewatching videos, make a bullet point of important points. Make sure you are not cramming too much info at once as you can overfill your mind with so much knowledge. try and relax mainly (easier said than done) as if tired or stressed studying just bounces of your mind, and also naturally some courses will be harder and longer to grasp than others. I know how frustrating it can be sometimes to study and not remember the material my memory is terrible, but I'm sure there is a lot of people are in the same boat as ourselves.

My method: write down key points of each lesson then apply them in a "Test Dummy" site or app on my local machine. It's helps to apply it in a real situation than just watching the videos. It helps me remember things much better.