The same happen to me since Juno, with Loki I could without issue. Now is not possible to upscale any video content

The only way to bypass it is to maximize it/go fullscreen on the main display and then send it to the desired one (winkey+shift+right_arrow)

I couldn't figure out where to watch in the logs to check what happen

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I use chrome to watch netflix and youtube in kiosk mode

just save the app shortcut then edit it and add **--kiosk** and **--window-position=X,0**

where **X** stand for the x coordinate where the second display starts

https://peter.sh/experiments/chromium-command-line-switches/


check your displays with:

**$ xrandr --query**

that will make chrome go fullscreen and load on the second display
for youtube -> youtube.com/tv (works awesome)