Your videos get smaller as they upload.

When you upload a video, it gets squeezed down to a smaller file size while it's going up. The video quality stays the same but the file takes up less room. It's like packing a suitcase smarter instead of just shoving everything in.

You don't do anything different. You hit upload and it happens on its own. The video arrives smaller and ready to share.

This matters if you upload a lot of videos in one day. Everything moves faster and your storage costs stay down.