collage.video plays several clips and photos at once inside one frame. Pick them all at once and Auto layout suggests one of 35 layouts with two to nine cells: grids, split screens, mosaics, picture in picture, polaroids, film strips and before-and-after. Reframe, zoom, trim or mute each cell, style the gaps, borders and background, add captions and a song from your device, and export a 1080p MP4. Free, no account, no watermark, made in the browser.
Putting two or more clips side by side normally takes a timeline editor and a lot of keyframing, and free apps often cap the resolution or add a watermark. collage.video was built so anyone can make a split-screen or grid video in a minute, in the browser, at 1080p.