It's a matter of incentives, having made such a video you no doubt have a good understanding of the time required to produce this kind of content. Even publishi

It's a matter of incentives, having made such a video you no doubt have a good understanding of the time required to produce this kind of content. Even publishing clean, reproducible code, which should be the absolute minimum, takes a lot of time and is absolutely not rewarded. So when researchers have a choice between publishing two papers with no supplementary material or publishing a single one that is well documented, cleanly coded, with a blog post, a video explanation, etc... it's no question. With the current incentive structures the choice is made for you.