AV1 Is the New Video Standard: What It Means for Your Website and Your Synthetic Media

If your website delivers video — and in 2026, most professional sites do — a quiet but fundamental shift just rewrote the rules of how that video reaches the browser. And if you are using AI-generated video or synthetic media, this shift hits twice as hard.

In May 2026, AV1 crossed every threshold that defines a codec as "the new default." YouTube now encodes over 75% of its catalog in AV1. Netflix delivers 30% of all streaming hours in AV1 and expects it to overtake H.264 before the end of 2026. Meta reports over 70% of video playback across Facebook, Instagram, and Messenger already uses AV1. And 88% of large-screen devices certified between 2021 and 2025 include AV1 hardware decode.

These are not projections. This is production traffic at global scale. And it has direct implications for any business that delivers video through its website.

What AV1 Is and Why It Won

AV1 is the video codec developed by the Alliance for Open Media (AOMedia), a consortium that includes Google, Netflix, Apple, Amazon, Microsoft, Meta, Intel, NVIDIA, and Samsung. Published in 2018, it was designed as an open, royalty-free alternative to the licensing mess that crippled H.265/HEVC.

AV1's promise was always clear: 30% better compression than HEVC and 50% better than H.264 at matched perceptual quality. For years, its Achilles' heel was encoding speed — AV1 was 30 to 100 times slower than H.264. That is no longer true. Modern GPUs (Intel Arc, NVIDIA Ada Lovelace, Apple M-series) include hardware AV1 encoders that achieve real-time 4K encoding.

The Numbers That Matter

That 56% means a video that used to weigh 10MB now weighs 4.4MB at the same visual quality. For a site with multiple videos, the accumulated savings transform Core Web Vitals.

What AV1 Means for Your Website

1. Core Web Vitals: The Direct Impact

The most immediate benefit of AV1 is page weight reduction. A 5MB H.264 hero video becomes 2.2MB in AV1. In the context of LCP, where every kilobyte counts, this can be the difference between a failing LCP of 2.8 seconds and a passing 1.9 seconds.

At Mintec, we have seen this on real client projects: sites with hero-section video that migrated from H.264 to AV1 reduced their LCP by an average of 0.7 seconds. Without touching anything else. No design changes. No more aggressive compression. Just the codec swap.

For INP, the benefit is indirect but real. Fewer downloaded bytes means less competition for the main thread. The browser can process interactions sooner because it is not busy downloading and decoding a heavy video file.

2. Synthetic Media: The Overlooked Use Case

Here is an angle almost nobody talks about. AI-generated video — tools like Veo 3.1, Kling 3.0, Sora 2, or Seedance 2.0 — produces files that are often significantly larger than traditional video. Why? Because AI generators prioritize visual quality over compression efficiency. A 10-second clip from Kling 3.0 at 4K can weigh 15-20MB in its native output format.

If that clip lands on your website without transcoding, you are tanking your Core Web Vitals. The solution is not to stop using AI video — it is to integrate AV1 into your post-processing pipeline.

In our previous article on AI video quality in production, we mentioned that post-processing is mandatory. AV1 is exactly the type of optimization that makes synthetic video viable for web delivery.

3. Browser and Device Support in 2026

88% of devices launched since 2021 have hardware AV1 decoding. The remaining 12% — pre-2020 equipment — falls back to software decoding, which works but consumes more battery. The recommended strategy: AV1 as the primary target, H.264 as the legacy fallback.

How to Implement AV1 in Your Video Pipeline

You do not need to replace your entire video stack. The practical implementation is straightforward:

1. Transcode to AV1 in your post-processing pipeline. Use SVT-AV1 (the encoder built by Intel and Netflix) at preset 5 or 6 for an optimal quality/speed balance. For most web projects, a single AV1 rendition at 1080p is sufficient.

2. Use <video> with multiple sources for AV1 with fallback. Not every browser supports it — H.264 fallback is mandatory.

<video controls poster="poster-avif.jpg">
  <source src="video.av1.mp4" type="video/mp4; codecs=av01.0.05M.08">
  <source src="video.h264.mp4" type="video/mp4">
</video>

3. Apply the same logic to posters with AVIF. Just as video benefits from AV1, posters benefit from AVIF — the image format based on the same codec. An AVIF poster weighs ~50% less than the equivalent JPEG.

4. Measure the CWV impact after migration. Verify that LCP and INP improved. Use the CrUX API or WebPageTest to measure before and after.

At Mintec, we implemented this pipeline as part of our performance budget framework for synthetic media sites. Step one of our CI checks that every new synthetic asset gets transcoded to AV1 before deployment.

The Bottom Line

If your website delivers video at any scale, AV1 should be your primary codec today. Not next year. Today. Browser support is where it needs to be, hardware encoders solved the speed problem, and the page weight savings are too large to ignore.

For sites running synthetic media, the recommendation is even more urgent. Unoptimized AI-generated video can destroy your Core Web Vitals. Transcoding to AV1 should be a non-negotiable step in your production pipeline — as essential as writing the script or choosing the voiceover.

Our guide on image and video formats for 2026 goes deeper into optimization strategies. And if you are building a video pipeline for synthetic media, our video-first content architecture guide covers how to structure these assets in a headless CMS.

The shift to AV1 is not just another technical decision. It is one of those rare changes where everyone wins: you get faster pages, your users get a better experience, and your video servers use less bandwidth. The question is not whether you should adopt it. The question is how quickly you can.