can not force myself to study everything, youtube, remember, practice, actually

sdada

Being lazy to study and actually don’t know what to read, everything seems to be familiar but in mock/practice exams everytime got some tiny things which I don’t remember clearly.
Tried to have a rest (1 day) but it didn’t help, so hard to concentrate and wasting a lot of time by mixing study preparation with watching youtube clips, photos and etc.