How to stream 4k on 9365 with uhd display

I contacted customer service because I could not figure out how to stream Netflix or YouTube 4k video.   I asked if Cinema was available to download for the 9365 and was told that it was not available for the 9365, but that I was still able to enjoy 4k media on my laptop.  However, I cannot figure out how to do that.  I paid for the 4k display, but have not been able to use it yet.  Can anyone head me in the right direction?

Thanks in advance for any help.