[danjc]

I'd it's processed in 2 seconds, why not just process it immediately in memory?

[swiftcoder]

Because they are serverless, so there's currently no memory for it to be processed in at the point of upload

[liqilin1567]

Maybe there are too many requests, so they have to offload the videos to s3.

[dboreham]

That's not the reason. And furthermore any buffer/re-try mechanism should be done at the edge (on the camera).