Advertisers can serve 5+ second in-stream or out-stream video ads in MP4, WebM, or FLV format using the Amazon Ad Platform.

Video assets

Aspect ratio (dimensions) 16:9 (640x360 px standard definition or 1920x1080 px high definition)
Frame rate At least 15 FPs
Audio 128kbps / 44khz
Recommended bit rate 2Mbps
Preferred codec Video: H.264, MPEG-2, or MPEG-4; Audio: MP3 or AAC
Recommended file size 100MB (larger sizes are supported but may require longer SLAs)
Video duration 5 to 30 seconds

Third party serving

Advertisers can use third party video tags from an Amazon certified third party vendor. The tags must be VAST 2, VAST 3, or VPAID 2. We recommend including VAST 2 tags in every campaign to ensure all supply sources can be used, as some sources do not support VAST 3 or VPAID. If a VPAID tag is provided, we recommend it includes both Flash and JavaScript to access more inventory.


Video viewability should be measured using VPAID tags from one of the approved vendors.

CORS header formatting

In order for JavaScript video players to accept a VAST response, ad servers have to include a Cross Origin Resource Sharing (CORS) header formatted as:

Access-Control-Allow-Origin: <origin header value> 

Access-Control-Allow-Credentials: true 

Without a valid VAST response, a video creative will not serve on Amazon-owned sites. This limitation is in place because of privacy concerns over Amazon’s customer data.