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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