Question Why cant I watch full screen on second monitor?

[Gamingserious5]

Recently connected a second monitor to my setup but I can not watch videos on full screen on it. Both screens work perfect separately but not when connected at the same time.

 

[Ralston18]

The objective being to have the video shown full screen on both monitors at the same time - correct?

Or just the full screen video only on the second monitor while the other screen is displaying other windows.

Update your post to include full system hardware specs and OS information.

Include monitors' make and model information (specs) and what connectivity is being used between your setup (computer) and the respective monitors.

What software are you using to watch videos?