jellyfin.org/docs/general/server/media/_video-3d.md

3D Videos

3D Videos are identified using flags in the file name. To identify 3D content by filename, the first tag is 3D, which must be combined with one of the following tags to specify the specific 3D format:

Format	Flag
half side by side	hsbs
full side by side	fsbs
half top and bottom	htab
full top and bottom	ftab
Multiview Video Coding	mvc
Anaglyph	Not Supported

The tags are case-insensitive and must be surrounded by either a space, hyphen -, dot ., or underscore _.

Awesome 3D Movie (2022).3D.FTAB.mp4
Awesome 3D Movie (2022)_3D_htab.mp4
Awesome 3D Movie (2022)-3d-hsbs.mp4

S01E01 Some Episode.3d.ftab.mp4
S01E02 Some Other Episode.3d.ftab.mp4
S01E03 Yet another episode.3d.hsbs.mp4

Additionally, 3D filename tags can be combined with the grouping functionality in movie and music video libraries. All text before the hyphen must match the folder name.

Movies
└── Awesome 3D Movie (2022)
    ├── Awesome 3D Movie (2022) - 3D_FTAB.mp4
    ├── Awesome 3D Movie (2022) - 3D.hsbs.mp4
    └── Awesome 3D Movie (2022) - 1080p.mp4