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Video Validation Tool

Test VAST In-Stream video ad creatives for compliance and performance issues.

Test your VAST In-Stream video ads to ensure they meet industry standards and deliver optimal performance across platforms.

Enter your video URL below to start the validation

Choose a profile your video ad creative should be tested against. Then enter the URL to your video file (mp4, webm, or ogg formats are supported) and click "Validate Video" to begin the analysis.

VAST In-Stream Video TestDisplay Ads Video Test

What we test for

When you run a test in our Video Validator, we check your video file for the following common properties and best practices of video ad creatives:

Video Duration Test

Video Duration test analysis value is total length of the video in seconds. For video ads, it is recommended to keep the duration between 3 to 60 seconds to maintain viewer engagement, where longer videos may lead to higher abandonment rates. For display ads, shorter durations of 15 to 30 seconds are often more effective. Display video ads exceeding 30 seconds may face heavy ad intervention.
Video Duration Test Profile: Test your video duration to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video File Size Test

Video File Size test analysis describes the size of the video file in a human-readable format. The video file size is an important factor for ad delivery and user experience. Your video file size should be optimized to balance quality and loading times and sit within a minimum size of 500.00 KB and a maximum size of 2.00 MB for display ads and up to 10.00 MB for VAST video ads.
File Size Test Profile: Test your video file size to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Extension Test

Video Extension test analysis checks if the video file extension (e.g., mp4, webm, ogg) is supported for ad delivery.
Video Extension Test Profile: Test your video extension to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video File Format Test

Video File Format test analysis checks if the video file format (e.g., MPEG-4, QuickTime) is supported for ad delivery.
Video Format Test Profile: Test your video format to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Resolution Test

Video Resolution test analysis. Value is total pixel count (width * height).
Resolution Test Profile: Test your video resolution to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Frame Rate (fps) Test

Value is how many frames per second (fps) your video plays. Standard frame rates are 23.976, 24, 25, 29.97, 30
Frames Per Second Test Profile: Test your video frames per second to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Bit Rate Test

Video Bit Rate test analysis (bitrate indicates video quality level) the higher the bit rate, the better the quality.
Bitrate Test Profile: Test your video bitrate to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Codec Test

Video Codec. Codec determines how video data is compressed and decompressed. Modern codecs like H.264 and H.265 offer better quality at lower bit rates compared to older codecs.
Video Codec Test Profile: Test your video codec to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Moov Atom Location Test

The MOOV atom contains important metadata for video files. It should be located at the beginning of the file for optimal playback. This allows for faster streaming and playback start times by enabling the video player to access necessary metadata without downloading the entire file first.
Moov Atom Location Test Profile: Test your video Moov Atom location to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Aspect Ratio Test

Video Aspect Ratio test analysis describes the proportional relationship between the width and height of the video. Common aspect ratios include 16:9 (widescreen) and 4:3 (standard). Using standard aspect ratios ensures compatibility across various devices and platforms, providing a better viewing experience.
Aspect Ratio Test Profile: Test your video aspect ratio to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Video Color Space Test

Video Color Space. Color space defines how colors are represented and displayed. Common spaces include Rec. 709 (HD), Rec. 2020 (4K/HDR), and sRGB.
Color Space Test Profile: Test your video color space to ensure it meets industry standards and delivers optimal performance across platforms.View test Profile

Why validate video ads

Video ads don’t just need to play — they need to meet industry standards, deliver a seamless user experience, and perform reliably across every environment. Validating your video ads ensures compliance with IAB specifications such as VAST, OMID, and SIMID, which define how ads should load, track, and interact with players. When these standards aren’t met, ads can fail to render correctly, misreport impressions, or break entirely in certain placements.

A key reason to validate is to prevent issues flagged by Heavy Ad Intervention (HAI) — Google Chrome’s system that automatically unloads ads consuming excessive CPU, network, or memory resources. Heavy ads not only waste media spend but also degrade page performance and user trust. By validating your creatives, you can identify oversized files, inefficient scripts, and playback errors before they reach the end user.

Ultimately, video ad validation protects both your ad performance and your audience’s experience. Valid ads load quickly, respect device resources, and track properly — leading to better completion rates, accurate analytics, and higher engagement. It’s the difference between a flawless, standards-compliant ad and one that disrupts the viewer, drains resources, or gets blocked entirely.

Looking to validate your VAST tags?

Once your video file is validated, take the next step with our VAST Tag Tester It helps you understand how your ad behaves in real-world VAST players — verifying tracking events, error responses, wrapper chains for true IAB compliance and much more. Learn by our VAST examples on how to structure and optimize your VAST tags for maximum ad performance.