I made some video maybe one every 2 ou 3 years, in holidays... I am happy that my cameras can do it when needed, but then I will use one of my MFT camera which are just very good about it.
When I use my 645D, video doesn't lack to me; when I use my K1, I never think about making video with it as I get better and lower cameras for that.
That said, about Pentax, I do not think full HD Capabilities does really change something to the price ... because you jut don't need the same technical specs for full HD comparing to 4k or 8k cameras. I believe that pentax offer the video capabilities their camera dedicated to photographers CAN do. But we can't call the K1 a video camera that can produce still images