HTML5 Guidelines
Interactive & Rich HTML5 Display Specifications
Supported Image Types: JPG, PNG, and SVG
Supported Video
- Must support MP4/H.264 and WebM/VP8 playback. OGG/Theora support is optional
- If submitting both MP4 and WebM, the weight limit applies to each individual file and is not a combined measurement of the two files
- Video should only be loaded when required
- Preloading video is not permitted
- Site-Served: If MP4 or WebM files are not available or within spec, Yahoo will transcode available source files (MP4, MOV) into various playback formats to maximize browser and device compatibility
Autoplay Video
- Video playback can be leveraged to replace animation using the “Autoplay” attribute,
- Autoplay animation and/or video length cannot exceed 15 seconds
Audio
- Audio must be muted on autoplay
- Onload/Autoplay audio is not permitted
- Sounds played on click are allowed
- All sounds are subject to approval by Yahoo
Tracking
- Video metrics, custom-defined interactions, clicks, and impressions WILL be tracked