TODO
- MP4
- Lazy loading
- Native MW support?
WebM (JS)
Preferable for full video.
Ogg (JS)
Also full video.
WebP (JS)
Preferable for animated images (transparency and small files).
PNG (native)
Preferable for images (transparency).
APNG as PNG (native)
Okay for slideshow images (transparency but otherwise large files).
GIF (native)
Not good (poor color palette, bad transparency, large files).
