Imported clips used to go black after a page reload. That is fixed, and files are smaller now too.
Why clips disappeared
Files over 4 MB were being rejected by the API route's body cap. The import looked like it worked, but what you got was a session-only blob URL that pointed at nothing once the page reloaded. Files now upload straight to storage through a presigned URL, up to 512 MB, and an upload that still fails says so in the import notice instead of failing quietly.
Smaller files, automatically
Uploads are compressed on arrival. Photos become WebP at 90% quality, and videos up to 80 MB are re-encoded to WebM. In both cases the compressed version is only kept if it is at least 10% smaller than the original, otherwise the original is left untouched.
Files above that 80 MB inline limit are stored as they are so the upload finishes immediately. An hourly background job re-encodes them to WebM in place afterwards, same link, smaller file, and it skips any file where compression would not actually save space.
How you'll experience it
Import as usual. Large files land faster, and a clip you imported yesterday is still there today.