Trailers
All four official videos, newest first. To protect your privacy, YouTube only loads when you press play.
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Launch Trailer
In-game footage captured on PS5.
SongFlower in a Hurricane, Justice feat. Tame Impala, SZA and King Gizzard & the Lizard Wizard
Official -

An Extended Look
Almost half an hour of gameplay, first shown on Netflix.
Source: Rockstar Games, An Extended Look
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Trailer 2
Introduced Jason, Lucia and six more characters.
SongHot Together, The Pointer Sisters
Reported -

Trailer 1
The first look at Lucia, Vice City and Leonida.
SongLove Is a Long Road, Tom Petty
ReportedSource: Rockstar Games, GTA VI, Shacknews on the trailer song
Stills: screenshots by Rockstar Games. Songs marked Reported are credited by the press, not on Rockstar's trailer pages.