VR UI/UX design
From Virtual Reality, Augmented Reality Wiki

EmbedVideo was given an illegal value for the alignment parameter "VR Interface Design Manifesto by Mike Alger". Valid values are "left", "center", or "right".
EmbedVideo was given an illegal value for the alignment parameter "VR Interface Design Pre-Visualisation Methods by Mike Alger". Valid values are "left", "center", or "right".