Did you even watch the video ? They took the time to specifically address this point with explanations and examples of moments where they put the camera back for you to see the character, as well as cut-scenes.
You know cut-scenes exist right?
Did either of you read anything I said?
Yes, there is third-person, but if it's minimized to cut-scenes and certain traversal actions, you don't get the same reinforcement that you're playing as the character as seeing them on screen at all times. The developers give the rationale that first person is more immersive - but I think that, paradoxically, not seeing the silhouette of the character at all times actually does far more to lessen immersion.
If I see Spider-Man on screen, it is concrete that I am playing as Spider-Man:
You can take almost any screenshot from the game and immediately know. Hell, I even used a screenshot of a random old Spider-Man game to illustrate that the point applies across games, even.
Similarly I can do this with Batman:
Now I look at
moment-to-moment gameplay from Indy (ie. what a huge amount of the game will look like because of muh first person immersion):
What are we looking at here? The new Elder Scrolls? The new Wolfenstein? A WW2 COD game? Some puzzle solving walking sim? A UE5 tech demo showing off a jungle? Without the silhouette the game loses its identity, which it would easily have if it looked like this at all times:
Boom, immediately obvious, and the key point is that by reinforcing this to the player at all times via a third person view, the player will feel like Indy more.