What video formats and file sizes are supported?

If it plays, Zazu can probably clip it.

Zazu supports all common video formats: MP4, MOV, AVI, MKV, and WebM.

For best results, upload MP4 (H.264) at 1080p. It's the most widely supported format, and it processes faster than larger or less common file types.

You don't have to upload at all. Paste a YouTube, Vimeo, or Google Drive link and Zazu pulls the video in directly — no downloading and re-uploading.