Sourcemap and video courses, honestly compared
a video coursePre-recorded lessons on a platform like Udemy or Coursera, self-paced, usually cheap or included with a subscription, taught by one instructor working through the material.
The problem with video courses is not quality. Some instructors are outstanding and worth every hour. The problem is structural: watching is a recognition activity, and the thing you need is recall.
Watching someone build something produces a strong and specific feeling of understanding, because you follow every step and nothing is confusing. That feeling is real and it is not knowledge. The test is whether you can do it a week later with a blank editor, and for most people, after most courses, the answer is no.
01 / Where a video course is better
Listed first, and meant. A comparison that finds no merit in the alternative is an advertisement.
- 01
Watching an expert work is genuinely instructive
Some things are far easier shown than described: how someone navigates unfamiliar code, what they check first when something breaks, which details they skip. That is real value and it is why video is not going away.
- 02
Low friction on a bad day
Some evenings you do not have the capacity for active recall, and something is better than nothing. A video is easy to start, and that counts for more than learning-science purists tend to admit.
- 03
Depth in one narrow topic
For a single tool or framework taught by someone who knows it deeply, a good course is hard to beat. A ninety-day path across three fields cannot go that deep on any one thing, and does not claim to.
02 / Where this is better
- 01
You are asked before you are told
Every day's prompt quizzes you before it explains anything, which is deliberate and it is the single largest difference. Failing to answer and then getting the explanation produces retention that watching the same explanation does not. It is less comfortable, which is roughly the point.
- 02
It comes back before you forget it
A course ends and the material begins decaying immediately. Concepts you rated weak here resurface on a spaced schedule, days and then weeks later, capped at ten a day. That is the mechanism that turns finishing into knowing.
- 03
Completion is not the metric
Finishing a course means the video ended. Here a concept counts as mastered when you can explain it, recognise it, apply it, debug it and argue its tradeoffs, and you rate those separately. There is no button that just marks it done.
- 04
Video is still there when you want it
This is not an argument against watching. Every day carries hand-checked videos, docs and articles covering the same ground, so you can take that route whenever you prefer it. The difference is that the day does not end when the video does.
03 / Which one
Use a course when you want to see a specific tool used well by someone who knows it. That is what the format is best at.
Use this when you want the material to still be there in six months. Both routes are available on every day here, which is deliberate. What is not optional is being asked to produce the answer before you are shown it.
04 / Common questions
- Why are video courses bad for retention?
- They are not bad, they are passive, and passive review produces recognition rather than recall. You watch, it makes sense, and the sense-making feels like learning. Retrieving an answer from memory before being shown it is what produces durable knowledge, and video has no natural place to put that.
- Does this have videos?
- It links to them rather than hosting or embedding them. Each day carries a few hand-checked videos, docs and articles from people who teach that topic well, so you can watch or read instead of using the prompt. They are other people's work and we only ever link out to it.
- Is this just prompts for ChatGPT?
- The prompt is the teaching layer, and it is a curated one: written for that day, that scope and that level, with an instruction to test you first. Around it sits the sequence, the exercises, the recall questions, the mastery criteria and the review schedule, which is the part a prompt on its own cannot give you.