honestly, any conclusions from this video performance are speculative. All we know is that a pro can follow a storyboard, and his video director's advices, so he shows the same admireable professionalism that he expects from his own models. Everything beyond that is like always, when something is purely speculative: one sees what one wants to see.
A pentax fan, or many forum members, will likely view it like you, kadajawi.
Someone on a "true Pentax mindset", i.e. someone who likes to think different, self-determined, and not always to follow the crowd, may have a more balanced view. I'm probably an example for that rare type (sometimes).
And then there is the category of DSLR market joiners and those already having another brand. I can imagine that they might think "Well, this vid shows that Pentax starts purchasing pros in their desperate or even rediculous attempt to suggest an APSC cam for a FF segment, burdened with their traditional hobbyist-only travel lens offerings, where everyone else knows that pros go for brands with fast primes or zooms." So they might smile as well after they saw the vid, but for a different reason than we do.
But never mind, the K-3 is only a snapshot in time. Pentax time may come with a different pro market impact, as soon as they launch a FF, !AND! if they re-do their lens offerings setup substantially, to accompany a FF body launch. Then they can do pro videos with a reach far beyond the Pentax fan community (provided that the Pentax FF and esp. the lenses will be good, optically and having their AF motors on a pro level reliability and durability, rather than on a toy level).
Then give the pro market another 5 to 10 years of gaining confidence in that, and the pros' future will be brighter
. Over the following 50 years, the current CaNi-mix (disregarding medium format for a moment) could then be replaced gradually with a CaNiPe mix, where Pentax may hold a pro share of well above a one-digit percentage figure at the end of this period.
Or, plan B, do it like Sony, i.e. the more commercial but apparently successful thinking: Do the "mission possible", know the market where you are good in, and try to stick to that, especially carefully if makets are rather shrinking than growing.