I calculated how much time I wasted taking notes from YouTube lectures. The number is embarrassing.
Last semester I was studying for my exam almost entirely through YouTube.
Karpathy's neural network series. MIT OpenCourseWare. 3Blue1Brown. Hours and hours of content.
Here's the problem: my actual study workflow looked like this —
- Play video
- Hear something important → pause
- Alt-tab to Notion → type half a sentence
- Forget the context → rewind 20 seconds
- Play again → lose focus because I'm thinking about the note I just wrote
- Repeat 150 times per video
I timed myself once. For a 45-minute lecture I spent 1h 40 minutes actually "studying" it, and retained maybe 40% of what was said.
The issue isn't the content. The issue is that the human brain can't simultaneously watch, listen, understand, and write at the same time. Something always gets sacrificed. Usually it's understanding.
Does anyone got any advices ?