I have a suspician that those who can learn easily from a lecture will also learn easily from a video but those who struggle in a classroom will struggle even more with a video. It can be played again and again (and a textbook can be read againand again) but what is usually needed is for the problem to be explained in a different way not again and again.

But mostly I agree with the position that the child spends enough time at school and more efficient use of time would be a better approach.