I think the big "?" is whether or not the level of competition he faced in those YouTube's inflates his talent and in the NFL it won't be so obvious.
My gut, for what it's worth, tells me he's the 'real deal', however.
I'm 'moved' by camp reports. We only have to look back a single year to Goff's rookie season to notice a very different 'overall' attitude between 'reports'... Goff received praise but tempered with a lot of caution soon followed by "gonna take him a while' warnings. With Kupp not so much, if at all. Lot of 'don't get your hopes up' warnings but all based on historical data and NOT Kupp himself. -- JamesJM