There are more variables, but at least it gives a general idea of the server's potential.
Just don't take cloud hosting or non-unlimited hosting if you're unsure.
Like, let's say you pick the 20$ droplet here and exceed it by 10TB:
https://www.digitalocean.com/pricing/
You'll owe them an overcharge of 205$.
With video your bandwidth can be eaten really fast without you noticing it.