[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.

[Wowfunhappy]

This was at least six years ago. At the time, yes I'm pretty sure Lottie was a lot smaller. However, iirc we largely abandoned it in favor of videos anyway because the lottie animations wouldn't render correctly without additional work.

[robertoandred]

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

[Wowfunhappy]

The less-abridged process was "the designer exports a ProRes video, and I (personally) spend an hour experimenting with different ffmpeg settings to get it as small as possible while retaining a level of quality the designers will accept."