It works really well for coding and design. I often much prefer the video over long form reading (lengthy blog posts, books). It is however not a good medium to reference later quickly.
The problem I personally have with video courses: Most of them stay on a beginner level. Unless the market is really huge (example: Adobe Photoshop) there are almost no intermediate or advanced classes.
Also sifting through courses to find the right one is tedious and the promises of the sales page are often not kept. Yes, some offer a money back guarantee, but let’s be honest sometimes you buy in and then don’t actually finish in time to make your final decision.
Most of the time I attended any conference, speaking gig, lecture, a course/seminar outside of academia (general STEM field) or programming I found myself being disappointed and it felt that I spent too much money on the attendance fee. Online courses in the productivity space (or worse sales/marketing) give me the same feeling.
I however find it highly valuable, if people show and explain their actual system. Maybe even with real and live data and not some artificially crafted “sample project” setup. But even those are tough to find. The aforementioned Notion Office Hours series does a good job with this, but is obviously highly skewed towards the usage of Notion.
If anybody wants to create something new in that oversaturated productivity space with an abundance of podcasts, blogs and youtube channels please start a youtube channel that interviews people from different professions in 20-30min. long videos that has them showcase their entire productivity system briefly. From inputs (mails, texts, notes, readings), over how to capture and organize tasks, how to manage working files and information and how archiving is done. This would be amazing to get inspiration and it will be a uncrowded niche in that space.