Site-Served (1st Party) Video Assets
When you upload a video asset directly to Storefront, our ad server automatically transcodes the source file into the formats needed for delivery across publishers and devices.
For the best quality and compatibility, we recommend uploading a high-quality source file that meets the specifications below.
Ad Length
Video ads should be 30 seconds or less, including standard :15 and :30 spots.
Longer formats, such as :60, may be supported upon request. Contact Support for assistance.
File Type & Video Codec
Accepted file types:
.mp4
Recommended video codecs:
H.264
Apple ProRes 422 HQ
High-quality source files are recommended since we transcode the uploaded asset for delivery.
Resolution & Aspect Ratio
16:9 is the preferred aspect ratio for CTV.
Recommended resolutions:
1920 × 1080 — 16:9, preferred
1280 × 720 — 16:9
1440 × 1080 — 4:3
Do not include burned-in letterboxing or pillarboxing (black bars) within the video.
Bitrate
For high-quality source files, we recommend:
15–30 Mbps for Constant Bitrate (CBR)
Up to 50 Mbps for Variable Bitrate (VBR)
Higher-bitrate mezzanine files, such as Apple ProRes, may also be used as high-quality source assets.
Frame Rate
Supported frame rates include:
23.98 fps
25 fps
29.97 fps
Use a constant, native frame rate whenever possible. Video should use progressive scan and should not contain interlaced or blended frames.
Before You Upload
For the best results, upload the highest-quality source file available. We will handle the transcoding required to prepare the creative for delivery across supported CTV inventory.
If your creative does not meet these specifications or you need assistance with a non-standard format, contact Support.
3rd Party Served Ad Tags
If you are using third-party ad tags, ensure they meet the following compatibility requirements:
Supported Tag Format
✅ VAST tags only (VPAID, MRAID, and JavaScript tags are not supported)
VAST is not supported for Managed Service. Please contact support with questions.
Required Video File Format
The video asset referenced in your VAST tag must be in .mp4 format.
Recommended Media Asset Formats
To ensure seamless playback across various devices and connection speeds, providing multiple resolution and bitrate options is recommended:
Resolution | Bitrate | Requirement |
960x540px | 1024 kbps | ✅ Required |
854x480px | 1536 kbps | ✅ Required |
1920x1080px | 2560 kbps | 🔹 Recommended |
640x360px | 716 kbps | 🔹 Recommended |
1920x1080px | 12,288 kbps | 🔹 Recommended |
3rd Party Tracking
✅ Accepted: Image pixel tracking
❌ Not Supported: JavaScript-based tracking
✅ VAST Tracking Events: All standard VAST events are supported, but VPAID events are not.
Note that VAST tags are not supported in the self-serve platform.
Ensuring a High-Quality Experience
By following these technical specifications, your CTV ads will deliver a seamless, high-quality experience and effectively reach your target audience.