Have an updated docker container, but when watching either through Channels or even using VLC, the stream stops after 1 second. No error logs thrown up in Channels DVR, so not sure how to trouble shoot. Any suggestions?
Also, can confirm the FUBO App is showing the 4K stream on the same TV I'm trying to watch through Channels. Unfortunately no pause allowed. 
Are you using the HLS or MPEG-TS feed.
Mine is recording using the HLS feed.
I had this issue earlier. Switching to the HLS version fixed it. Set the "stream format" for the source in Channels DVR to HLS and change the source URL to the one that ends in playlist-hls.m3u.
Thank you for this. I have updated to v1.16 but still getting the Fubo still graphic.
I am getting the same thing when I tune to the channel on Fubo's website only place it's working is my Apple TV and iPhone & iPad. Only supported web browser's is Safari is what it says on there website. Every other channel on Fubo is working besides CBS 4K.
Correct. For live viewing of 4k that's all explained on the Fubo website https://support.fubo.tv/hc/en-us/articles/360011479911-Does-Fubo-offer-any-content-in-4K-HDR
You can record the 4k with Channels DVR.
Correct, I have read that article plus have gotten my docker container working but it still has that graphic up saying not supported browser when tuning into the channel on v1.16.
Using what channels client?
Apple TV, iPad, and iPhone.
How can I do this?, all of my fubo channels have the proper guide except CBS 4K
Are you using the HLS playlist?
Yes.
Follow @joagomez instructions here Fubo TV project - #202 by joagomez
This is what the line looks like in mine
"1239200001": {"StationID": "152581", "name": "CBS 4K"},
Make sure the web page where the playlist links are found says it’s 1.16
I am seeing that on the web page. I just got done fiddling around with it and now I am receiving the 4K feed. Very strange. Thank you @chDVRuser and @joagomez for your help!
I did an M3U olivetin custom channel to add to the rest of my fubo custom channels.
I have this so far, it is now buffering, but no data guide
#EXTINF:-1 channel-id="9031" tvg-id="9031" tvg-chno="9031" tvg-logo="https://images.fubo.tv/channel-config-ui/station-logos/on-white/cbs_4k_logo_black.png" tvc-guide-stationid="152581" tvg-name="CBS 4K",CBS 4K
http://192.168.7.109:8089/devices/ANY/channels/9031/hls/master.m3u8?
Here's mine and it's pulling the guide info (as as yours):
#EXTINF:-1 channel-id="1239200001" tvg-id="CBS4K" tvg-chno="210" tvg-logo="https://images.fubo.tv/channel-config-ui/station-logos/on-white/cbs_4k_logo_black.png" tvc-guide-stationid="152581",CBS 4K
http://192.168.0.2:7777/fubo/watch-hls/1239200001
Have you gone to the source in Channels and redownloaded after entering the text in your custom channel? Even though it says its downloading after you enter the info, I find sometimes you still need to tell the source to redownload the guide data to get it to populate.
Can't speak for olive tin as I don't use it, but for my custom renumbering I use
transcode=none&codec=copy options
Just to follow up on this
No issues with FOX 4K, FS1 4K, or CBS 4K
Issues with NBC4K, - these streams seem to be encoded differently with Audio as EAC3 instead of AAC so thinking might be because of european encoding as these tend to be soccer feeds??? simply a guess here