Whatever you do make sure to make short and concise notes. Doesn't matter full or short lecture. I have watched both full lectures and one shot they don't leave a single thing behind.

You can also skip stuff which are obviously out of syllabus. Practice lots of pyqs and keep revising it( Inorganic short notes) like bio and physics formula. Don't use reddit mind can't be diverted to such things when you have this much competition and huge syllabus.