la ventana no contiene la opcion "Siempre visible" que e primordial para la heramienta

It's not working for some reason.
Upon clicking the button, the video on the tab pauses, a popup appears with a loading icon, then it just shows "Video unavailable", and 3 videos are suggested in the embed.
Tried it with multiple videos, and with/without private browsing
Also when clicking on the suggestions of a video that's opened via private browsing, a new tab opens outside private, so that's a leak, and I'm not sure if the popup is keeping the private browsing, or the video is logged as seen with my account outside private