Problem appears to be solved. I swapped out the RAM for another set of the same type. Without vaapi hardware video decoding, it can render Big Buck Bunny at around 35% CPU, under 10% with vaapi. With vaapi can render the Jellyfish 120 Mb/s bitrate 1080p video at around 8-12% CPU.
A big thanks to Frys in Renton, WA for being so accommodating with regard to the RAM swap. No questions asked.
I'm glad it's working now. Please let us know if you need assistance in the future
Thanks much. It's a nice little platform. 3840p60 (instead of p30) would have been nice out the DisplayPort, but I guess one can't have everything.