COVID-19 resources: We’re closely monitoring the developments of COVID-19. Find answers to some of your frequently asked questions.

Amazon DSP video ads

Video assets

Online Video (OLV)Over-the-Top (OTT)
Ad ServingFirst party (site served) or third partyFirst party (site served) only
Aspect ratio16:916:9
Minimum duration5s15s
Maximum duration120s30s
Recommended duration6s-30sA length of exactly 15s or 30s is required
Minimum frame size1920x1080 (640x360 for third party served)1920x1080
Minimum video bitrate4mbps (2mbps for third party served)4mbps
Recommended video bitrate8mbps8mbps
Maximum video bitrate15mbps15mbps
Video frame rate (fps)23.976 (recommended), 24, 25, or 29.9723.976 (recommended), 24, 25, or 29.97
Video frame rate modeConstantConstant
Minimum audio bitrate192kbps (128kbps for third party served)192kbps
Audio sample rate44.1kHz or 48kHz44.1kHz or 48kHz
Supported FormatsVideo: H.264, MPEG-2, or MPEG-4; Audio: PCM or AACVideo: H.264, MPEG-2, or MPEG-4; Audio: PCM or AAC
Audio ChannelMinimum of 2-ChannelsMinimum of 2-Channels

Additional OTT requirements

  • Only available in US
  • Site serving requires an MP4 video file
  • Requires file size less than or equal to 500 MB
  • Pillarbox or letterbox formatting is accepted, however, OTT ads with both pillarbox and letterbox in the same ad will not be accepted
  • OTT ads are delivered in non-clickable environments so they should not include call-to-action elements that encourage clicking (e.g., a button shape that says “learn more”)
  • Third party impression tracking is accepted for specific vendors, please consult your Amazon Advertising representative for details

Third party serving

Advertisers can use third party video tags from an Amazon certified third party vendor (excluding OTT). 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 ensures a positive experience for Amazon’s customers.

North America
  • CA
  • MX
  • US
  • DE
  • ES
  • FR
  • IT
  • UK
Middle East/Africa
  • UAE
Asia Pacific
  • AU
  • CN
  • IN
  • JP