Study with YouTube: find the lesson you need fast

Quick answer

Your professor's lecture didn't land, so you go to YouTube. Two hours later you've watched four intros and a sponsor read about a VPN. Here's how to study with YouTube and skip the detour.

What 125x is: 125x is a web app at 125x.app. You connect your YouTube subscriptions, and it gives you a feed of the latest videos from the channels you follow, each with a summary: a verdict, the 5 key takeaways, and the spoiler, plus Actionable and Lessons tabs with more tips. You read that and decide what's actually worth opening.

Find the right video fast

• Search the exact term from your syllabus plus 'explained'.
• Check the length. A 12 minute explainer usually beats a 90 minute stream for one concept.
• Scan the chapter names to see if it covers your piece.
• Read the top comments. Students point out mistakes fast.

Watch it smart

• Speed up to 1.5x or 2x. A UCLA study found little comprehension loss up to 2x on lecture videos, and advised using the saved time to study more (UCLA Newsroom).
• Use the transcript to find the exact part you're stuck on.
• Take timestamp notes so you can jump back the night before the exam.

Make it stick

• Close the video and explain it out loud like you're teaching a friend.
• Write three questions and answer them from memory.
• Rewatch the key part close to the test. That's what helped in the UCLA study.

Where 125x helps

Subscribe to the few channels that explain your subjects well and 125x puts a summary on every new video. The 5 takeaways are a quick review, and the Lessons tab holds the ideas worth keeping.

FAQ: questions people ask

Is studying with YouTube effective?

It can be, especially for concepts that didn't click in class. Pick short focused videos and test yourself afterward.

What speed should I study YouTube videos at?

Up to 2x. Research on lecture videos found little comprehension loss until speeds went past 2x.

How do I take notes from lecture videos?

Write a few words with the timestamp at the important moments, then review those spots later.

Related guides

• Take Notes on YouTube Videos Without Pausing Constantly
• Does Watching YouTube at 2x Hurt Learning? The Study
• Learn More From YouTube in Less Time: 9 Habits
• Read a YouTube Video in 2 Minutes: Transcript Summary
• Every 125x guide

125x is a web app at 125x.app that turns your YouTube subscriptions into a feed with a summary on every video, plus Actionable and Lessons tabs with more tips, so you can see what's worth opening before you spend the time.

125x is made by Blake Labs Inc. 125x is not made by YouTube or Google.