Build a story from your screen
Capture a rectangle: share your screen, draw a rectangle over the part you want, press Record. Or Import files / drag images and videos onto the storyboard below.
Select any clip to trim it, crop it, zoom in on the part that matters and add a caption. Export the whole story as MP4 or GIF.
Recording works in Chrome and Edge on a secure (https) page. Nothing leaves your browser; the project autosaves locally.