We are using a similar concept in production. Rendered videos for online education within programming. It is a limited usecase of course, but brings the same be

We are using a similar concept in production. Rendered videos for online education within programming. It is a limited usecase of course, but brings the same benefits: 1/100 bandwidth; crisp rendered text/content instead of rasterized; Easy editing; and the content is searchable / indexable. Using html gives us some additional benefits in that we can combine rendered with rasterized content. We also get access to a lot more advanced functionality through the browser context.