VideoCmd

VideoCmd

Displays an mp4 video full-screen for all players simultaneously — via a command. Suitable for
intros at spawn, cutscenes on maps, videos at events, advertising in-game events, etc.
Brief description (for a card on Modrinth)
Plays an mp4 video full-screen for all players at once, via simple commands /video start and /video stop.
What it can do
Full-screen overlay with video over the player’s interface (black bars on the sides; if the video’s aspect ratio doesn’t match the screen, the image isn’t distorted)
Launching the video simultaneously for all players on the server with a single command
Customizable playback duration — the video can be stopped after N seconds, even if the file itself is longer; you can also leave it unspecified — in that case, it will play through to the end once and then stop without looping
Customizable volume
Forced stop for all players with the /video stop command
Auto‑completion of video file paths directly in the chat (Tab) — inserts a list of files from the video folder.
Format check — accepts only .mp4, nothing else. command will reject with a clear error.
Support for subfolders inside the video folder (for example, trailers/teaser.mp4)
Commands:

/video start <path> [time] [volume]
/video stop

<path> — the path to the file inside the video folder, for example, intro.mp4 or trailers/teaser.mp4
[time] — how many seconds to play the video, then it will stop on its own (optional, by default — play until the end of the file)
[volume] — 0–100 (optional, default is 100)
/video stop — immediately stops and closes the video for all players
The player can also close the video locally using the End key.
Where to place the video
For players: .minecraft/video/ (the folder is created automatically the first time the game is launched with the mod)
To the server: <server folder>/video/

Requirements
Forge 1.19.2, build version 43.3.0 or newer from the 43.x branch
FancyVideo-API (forge,
1.19.2) — a mandatory client dependency; it is this that decodes mp4 via VLCJ and the built‑in VLC. Without it, the video will not be displayed. Not required on the server.
Video format — only .mp4
Technical notes
Native decoding via FancyVideo-API works out of the box on Windows; on other OSes, additional configuration may be required — see the FancyVideo-API page.
The video is rendered in the file’s native resolution; no additional compression/downscaling is performed by the mod.
Video decoding — FancyVideo-API by author
Nick1st (VLCJ + VLC)
License
MIT