This is not how such storage systems work. If the whole storage system is for you and you only store compressed video files on it then perhaps. But we are talk

This is not how such storage systems work. If the whole storage system is for you and you only store compressed video files on it then perhaps. But we are talking about multi-tenant systems here. You will get better performance and/or better prices if the system finds compressible data for other customers. All the benefits hold, even for you with non compressible data, if there is an overall benefit. Hitting a bottleneck less often then this will reduce your tail latencies, too. It is just that _your files_ won't contribute to these improvements. But you get all the benefits as well.