[filcuk]

That comparison makes no sense. Apples and oranges.

[Wowfunhappy]

The designer has created an animation in After Effects which has to play at some location on the web page. I can have the designer export a video and insert it that way, or I can convert the AE file to a Lotte animation. It looks the same to the user, so it's ultimately just a matter of bandwidth.

[sampullman]

Are you sure Lottie + SDK is heavier than the mp4? For one or two animations that hasn't been my experience, especially if you can do WebM and fall back to optimized mp4.

[robertoandred]

I doubt the designer did any sort of compression on that video. Animations usually compress very well.