One thing comes to mind. While it doesn't apply entirely in this case, there is something else underlying it that is still relevant.

The Alpha and Beta NDAs always articulated that the experiences of the pre-retail version of the game were not to be discussed or disseminated. In the Alpha versions, that was "never ever".

Why? Because content was still in development and the developers wanted the freedom to change things without the public going O-MY-GAWD every time something was altered, which happens a lot especially during those alpha phases.

This video pre-dates version 1.0 Alpha by... a lot! Stuff was gonna change. Inevitably.