In the video, you can see that airbag deploys from the bolster in the driver's seat that's on the passenger side. I looked at the diagram of airbag locations in the USA owners manual for my GT in the section on airbags, and an airbag was noted present in that location.
I believe this airbag is referred to along with the other two airbags in the seat bolsters as "Side Airbags (Seat-Mounted)" which may be cause for some of the confusion.