A quick follow up. My TV will play my gopro and so would my wife's computer, but it would not play the mp4 from the P3P. So, I changed to 1080p at 60fps and now the tv can view the mp4 and so can my wife's computer. So, it must be the codex with the 4k in the mp4 format. Later when I get a good computer, Mac or other, I'll then go back to 4k.