There's always someone ready to say that 2KB/s is too much for servers. There is never a real explanation or evidence of course, just vague hand waving, predictions about the future, assertions they hope people won't think about or validate, etc.
The person in this video was adamant that the sun revolves around the earth (yes really) possibly stemming from radical religious beliefs that most reasonable people would take as a sign of mental illness. Don't forget that he is essentially arguing that something that already works won't work.
I can't believe anyone would believe that cryptocurrency blocks can't go over 1 MB every 10 minutes when plenty already have. Most users don't even sync with the main chain even though they can. The whole thing is mind melting.
Why keep doing this? The second layer stuff is a solution in search of a problem and everyone behind it keeps trying to convince everyone there is a problem.