H264MP4Encoder imported unconditionally prevents tree-shaking

[bidossessi]

Recorder.js imports H264MP4Encoder at the top level, preventing tree-shaking even when a different encoder is provided.

This is problematic because h264-mp4-encoder:

• Has broken browser support (missing browser field in package.json)
• Is abandoned (last commit 2020, 11 unmerged security PRs)
• Causes CSP violations: connect-src blocked for data:application/octet-stream;base64,...
• Triggers Vite warnings about externalized Node.js modules (path, fs, crypto)

Suggestion: Use dynamic imports for fallback encoders so they're only loaded when needed.

Javascript, am I right? 😉