Here's a familiar one. You watch a lot of YouTube tutorials - Python stuff, woodworking odds and ends, random electronics projects. You finish a 40-minute deep dive, feel like you've absorbed it all, and then two days later you're staring at your code editor or your workbench with absolutely nothing in your head. Just a vague sense that you've seen someone do something similar once.

It's a bit unsettling when you notice it. Were you just moving your eyes across the screen? Was your brain actually processing anything?

Turns out, probably not. Not in any useful way, at least.

The illusion of understanding

Here's the thing about video content. It's passive. You sit back, someone walks you through something step by step, and it feels like you're following along. But following along isn't the same as learning. It's the difference between watching someone bake a cake and actually making one yourself.

The research (and it's worth being vague here, because there isn't one single study to point to) suggests that without some form of active engagement, most of what we consume goes in one ear and out the other within 48 hours. And YouTube, for all its virtues, is basically designed to keep you consuming. One video rolls into the next. There's no natural pause point to stop and think.

So you need to force one.

What actually helps

Try building a habit that sounds almost too simple to work. Keep a text file open (or a physical notebook, if you're feeling retro) whenever you watch a tutorial. Every time the presenter says something useful, or you have a thought about how you'd do it differently, pause the video and write it down.

Just a sentence or two. A timestamp if it's a specific step worth revisiting. A note about why you disagree with the approach. Anything that forces you to engage with the material instead of just absorbing it.

This is where a tool like Timestamp Bookmarks for YouTube, built by Jolly Good Apps, comes in. It's a browser extension that lets you save multiple timestamps in a video and add labels to each one. So instead of scribbling "minute 12:34 - the bit about error handling" in a notebook, you can hit Alt+S and type a quick note. It syncs across devices too, handy if you switch between a desktop and a laptop.

Is it perfect? No. The free tier covers most of what you'd need, and the Pro version is £12 a year if you want export features. But even just using the keyboard shortcut to drop a timestamp forces you to pay attention in a way passive watching doesn't.

What changed (and what didn't)

Give it a few weeks and something shifts. You can actually remember what you watched. Not every detail, but the core concepts. Someone asks about a tutorial you watched three weeks ago, and you can say more than just "yeah, it was good."

But here's the pessimistic bit. It's not a magic fix. You'll still forget plenty. You'll still watch some videos and realise halfway through that you've already seen them and retained precisely nothing. The habit only works if you actually do it, and there are days when you can't be bothered to hit pause and write a note.

And sometimes the act of writing distracts from the flow of the video. You miss a crucial step because you were typing up a note about something that happened thirty seconds ago. It's a trade-off.

The real takeaway

The specific tool matters less than the act of pausing and writing. Whether it's a notebook, a text file, or Timestamp Bookmarks for YouTube, the point is to break the passive consumption loop. To force yourself to engage.

If you've been watching tutorials and feeling like nothing sticks, try it. Just pick one method and stick with it for a couple of weeks. You might be surprised at how much more you actually take in.

Or you might not. Everyone's brain works differently. But it's worth a shot.