This message was posted on behalf of Intel Corporation1 of 1 people found this helpful
I understand that you would like to know which processor would be the best for 4K HDR playback. Regarding this, actually the HDR has been implemented on our core processors, from 7th generation and forward, so in this case no, neither the pentium nor the celeron are capable of doing so.
The best I would recommend you to do is to check on the list of processors, they come with the different graphics controllers and the maximum supported resolution and as long as they are core 7th generation and on they should work for the purpose.
Please refer to the link below for more information about the different processors:
Hope this helps.