No video on xfinity stream

@XfinityChe This is a direct connection (HDMI) from my iPhone to the tv. Xfinity Stream is the only program that will not stream certain videos to the tv. It does stream the video. Note that it does this with only some movies. Other movies stream fine. For example, it will not stream the Yellowstone series videos, but I do get the sound. Why does it work with some movies and not others? 

Thanks for confirming, @user_1c5885! That's a great question. Ultimately, the networks have the decision on what assets can be streamed and which cannot. I'd be happy to investigate whether or not Yellowstone is one of those assets. I can also check on others that you have problems with to confirm whether that is the issue or not. Can you send a direct message with your first and last name and service address? To send a direct message click the "Direct Messaging" chat icon in the top right corner of the page, then click on the pen and pad icon and enter "Xfinity Support" in the "To" section of the chat.

Still no video. Only sound from iPhone to TV using a direct line. Please check if the series “Yellowstone” on Peacock and Paramount + can be streamed. I get sound but no video. 
Thank you. 

We are happy to check on the series availability for you. We need to access your account to take a further look. Please send us a direct chat message with your full name and complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forums page.

Here are the detailed steps to direct message us:

• Click "Sign In" if necessary

• Click the "Direct Message” icon (upper right corner of this page)

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list

• Type your message in the text area near the bottom of the window

• Press Enter to send your message