There is more than just the server to consider as well. For example, if you're using Cloudflare (or another cloud security solution), there is a limit on the Max Upload size allowed. If you're using mod_security, it could possibly cause issues if it's configured to look at uploads.
Basically you need to evaluate EVERYTHING between you and the server... including your full security stack. That's something that would happen with your host. 🙂
