They're only claiming academic insofar as they facilitate learning through the videos. Not sure this qualifies as real academia - they are not an accredited school or university nor do they have teachers on staff or any other normal infrastructure. It's just a site that hosts videos for sale.
But what difference does it make - it's the classic user provided content model and all the issues it comes with that's causing the problem here. No company, academic or otherwise, wants infringement and if there was a perfect solution then everyone would use it, however it's just not feasible to be perfectly defensive and catch everything.
They do have > 500 employees so it's a company big enough to have checks in place with other video providers to catch basic things like this but still, it's a much harder problem than people think.