It looks like you're referencing a filename for a 3D movie rip (likely Half-Side-By-Side (HSBS) format). Here are the key features you can produce or extract from that title for a listing, a database (like Plex/EMBY/Jellyfin), or a torrent description.
Topics I can cover in a long article:
When James Cameron’s Avatar premiered in December 2009, it wasn’t just a movie—it was a seismic event in audiovisual technology. For the first time, a mainstream blockbuster used performance capture, fully CGI environments, and stereoscopic 3D in a way that felt immersive rather than gimmicky. Avatar became the highest-grossing film of all time (a title it has traded with Avengers: Endgame over the years) and, more importantly, drove millions of consumers to buy 3D TVs, Blu-ray players, and projectors. Avatar -2009- 3D-HSBS-1080p-H264-AC 3 -DolbyDig...
While VLC can play the file, it does not natively "merge" the images for 3D glasses unless you use specific filters. It is better to use dedicated 3D software like Stereoscopic Player 3. How to Create/Convert This File It looks like you're referencing a filename for
Option C: On a VR Headset (Quest, Vive, etc.) This format is perfect for VR: For the first time, a mainstream blockbuster used