Vintorix, I guess that we have to agree to disagree. :-)

IMO, those tutorials you mention are an excellent addition after one reads the manual. Maybe I'm old fashioned but that's how I see it.
This is especially true regarding the OP (Vue terminology). I think it's far more efficient to understand the terms by reading them in a manual, instead of viewing I don't know how many videos until finally that particular term pops up.