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MP4, GIF, or transparent WebM — pick the file for the room
The motion should be the same plate. The container changes because the room changes. A case study, a Slack thread, and a reel do not play the same file well.
MP4 is the default for work you present
Sites, case studies, and pitch decks want a real video file. It holds color, it holds a poster frame, and it does not dither the mark into candy. If you are unsure, start with MP4.
GIF is a passport, not a hero
Use a looping GIF when the surface will not play video, or when the clip has to live in a slide that might be opened offline. Keep it short. GIFs punish gradients and fine type. They are a delivery trick, not the best-looking master.
Transparent WebM is for overlays
When the mark has to sit on a keynote, a reel, or a color that is not the plate, you need alpha. Key from the plate hex after the clip is made. Do not ask a model to invent a checkerboard. Transparency is a post step on a locked plate.
Where Lottie actually belongs
Developers search “Lottie logo animation” because they want JSON on the web. That is a real job when the source is authored vector motion. It is not a job you fulfill by running a raster generator and pretending the output is Lottie. If you need web playback of a clip, embed the video or the snippet. If you need true Lottie, that is a different pipeline than image-to-video.
Questions designers ask
Can I use one file everywhere?
You can, if you accept poor fits. MP4 on a site, GIF in the places that need it, WebM when you need alpha. Same plate, three containers.
Does Dexta export Lottie from Kling?
No. That would be a fake vector. Export the files you can drop into a case study or a reel.
What about embed snippets?
Use them when the clip should live on a page you control and you do not want the visitor to download a file. The source is still the same locked plate.