Overview

Dedicated transcoding services

Most cloud providers have some form of transcoding service. AWS has Elemental MediaConvert, which lets you run "jobs" to transcode videos to different sizes, and provides an absolute ton of options.

Pros

• The dedicated service will be able to handle any task you throw at it, no matter how big
• As it has access to more powerful hardware, it will finish transcoding a lot faster

Cons

• It's a lot more expensive than using serverless code (for x265/HEVC, it'll cost around 400-500% more!)
• It's harder to set up an automated system around it

Admittedly, the pros and cons are a bit of a moot point, as there aren't any other serious ways to transcode videos that your serverless code function can't handle, short of trying to administer your own cluster of servers, which is best left to huge companies making their own in-house processing solutions.