How to Make Web Videos Way Smaller in 2025 Using the AV1 codec—Martian Chronicles, Evil Martians’ Team Blog

AV1 codec enables significantly smaller web video files (20-40x) while maintaining quality. Supported by major browsers, it excels at low bitrate compression. Users are encouraged to transition from GIFs to AV1 or H.264 for better efficiency. To optimize compatibility, accommodating both AV1 and H.264 formats is recommended, using FFmpeg for encoding. This approach enhances loading times and viewing experiences across devices, balancing quality and file size effectively.

https://evilmartians.com/chronicles/better-web-video-with-av1-codec