This is a practical idea. With capital I think you might even be able to recruit existing talent (video series on YouTube or specific person/team who makes them) to help consolidate the utility. I've seen first hand how educators of different levels strive to find good, usable content online in a variety of subjects. The hard sciences is of particular interest.

Related idea(s) for revenue: Purchase of 'supplemental' course materials (PowerPoints?) and/or "asset packages" that bundle relevant, high-quality graphics for educators to use in their own classrooms.

The layout is straightforward and I appreciate the tags for the type (Tutorial, Math, Chemistry). Feels just slightly busy but it's easy on the eyes. Hope it goes great for you and the team!