You can in the sense of pointing a video camera at the screen and recording it.
But if you want to capture the pixels before they are converted into light, HDCP may prevent you from doing so [1].
But if you want to capture the pixels before they are converted into light, HDCP may prevent you from doing so [1].
Very messy but it should work.
The HDFury devices work great: https://www.hdfury.com/tag/hdcp-stripper/