Place FFmpeg WASM browser assets in this folder to enable FFmpeg-first client-side video conversion.

Expected files:
- ffmpeg.min.js
- ffmpeg-core.js
- ffmpeg-core.worker.js
- ffmpeg-core.wasm

Current uploader behavior:
1) If video is already WEBM -> direct upload.
2) If non-WEBM video -> try FFmpeg WASM conversion first.
3) If FFmpeg is unavailable/fails -> fallback to built-in browser converter.

Paths used by the uploader:
- /assets/vendor/ffmpeg/ffmpeg.min.js
- /assets/vendor/ffmpeg/ffmpeg-core.js
- /assets/vendor/ffmpeg/ffmpeg-core.worker.js
- /assets/vendor/ffmpeg/ffmpeg-core.wasm

Note:
- Conversion still re-encodes video, so direct WEBM upload remains best quality.
