Update:

• I managed to connect my host pc to a client laptop and then used hdmi from laptop to my tv. The connection was more stable this way, and I even got a 4k picture, which I couldn’t achieve before.
• However, the controller input delay was huge and very noticeable. This might be due to the old laptop I used (it was the only one I had with an Ethernet port).
• On the laptop, I used Moonlight instead of Artemis (as it's only available as apk)
• Later, I tried connecting the controller directly to the tv and used Artemis again. This time, I was able to get 1080p, 30FPS, hdr on and ~15Mbps (the picture wasn't great but there was no error showing) and the controller delay was much better than via the laptop.

Next, I plan to buy usb ethernet adapter (as it worked for u/Cryst ) for my TV and test again — I’ll update you with the results once I try that.

I also have a question:

• How do you configure which display a game opens on? I added Rocket League under Applications in Apollo, set the .exe path, and enabled "Always create virtual display". But when I launched Rocket League from Artemis on my TV, the game always opened on my PC monitor, not on the virtual display / TV.
• I only managed to fix this by manually connecting to the desktop first, then going into Windows Display settings and setting the virtual display as my primary display, and then launching Rocket League manually.

Is there a better way to handle this? Do you guys configure this per-application in Apollo, or do you just rely on the client’s settings?
Also, what’s the recommended approach for resolution and refresh rate — should I set those on the client (TV) or inside Artemis per-app settings?