Komprez

Prepares a clip so WhatsApp’s encoder has less to ruin. Process it here, then post the result straight to your status.

Choose a video Nothing is uploaded. It is processed on this device.

What it does to the clip

Size: longest side capped at 1280
Video: H.264 High, up to 0.20 bit/px
Ceiling: never above what the source carries
Audio: AAC, untouched where possible

Frame rate

30 fps Keep source

Split

Off 60s parts

Off keeps one file and lowers the bitrate to fit the upload limit, which on a long clip costs quality. 60s parts gives each part its own full budget, but cuts on the clock rather than on anything happening in the video.

30 fps gives you 720×1280 on status. Keep source on a 60fps clip gives you 464×832, because WhatsApp caps pixels per second and pays for the extra frames by shrinking the picture. Sharper, or smoother. The bitrate is the same either way.

WhatsApp re-encodes everything to about 3000 kbps whatever you send, but it keeps your frame rate. A 60fps clip gets half the data per frame, and WhatsApp shrinks it to 464×832 as well. Handing it a clean 720p file at 30fps is what buys back the detail.

Then, in WhatsApp

Get the saved file onto your phone, by AirDrop or iCloud.
Open Status and add it straight from Photos.
Do not send it to a chat and forward it.

Forwarding is the popular advice and it is wrong. A forwarded clip lands on status at 480×848, against 720×1280 posted directly. Forwarding re-encodes a file WhatsApp already compressed once, so you pay twice.