Do you know what type of learner you are? If not you can do a quick quiz and then you can use revision methods that are best suited to your learning style.
For example, I am a read/write learner so I revise by writing out my class notes again and then making flashcards from those notes and if I still feel unsure on a topic I will make it into a poster or a mini revision booklet which has only the key information so like a very condensed summary.
If you are an auditory learner then videos would be good for you as would be reading notes out loud or making recordings of you reading your notes to listen to later. If you're a visual learner: videos could also be good depending on the video (not just text displayed on the screen) making posters or mindmaps or anything similar also works well and if you're a kinesthetic learner try watching videos of experiments for science to see the practical side of it or try making a revision resource that can be interactive e.g. flashcards