In this article, I will show how to convert GIF to MP4 to save data, how to embed the video responsible, how to react to the Save-Data header, how to enhance it using the IntersectionObserver and how to use MP4 as source for an image in supported browsers.įirst we have to convert our existing GIF files to MP4. Some of these GIFs are multiple MBs and while looking at GIFs can be really funny, it is less so if you watch them on a slow device or when exceeding your available data by reading only one article. Especially on article sites, many of these images may be GIFs. A big part of it (on average 1.8 MB) are images. In 2017, the average transfer size for websites was 3,4 MB.
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