Distributing video content via the AC3 Blockchain has dozens of benefits including the full ownership (copyright) of content.
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Teachers on those resources are paid (depends on how many students bought the course), there are fees, but these fees solve problems of safeness from copy and hacking, marketing - the platforms do it for the teachers. Every student knows where he/she can search and find a needed course. And we need to take into account, that to change the habits (studying at Udemy, Coursera is already a convenient habit) it is not enough for the product just to be better than competitors.