If you check out the text of the link at the top of the page, it has some helpful context. Specifically, that the linked website is for "video calls, in 3D"

But in any other context you'll likely not know what it is. Even with the title, I have very very little idea of what it means. Video calls with one other person? Multiple? Are they recorded? Define "3D". There needs to be at least some high level explanation on the page (or a link to one).