You are off by four orders of magnitudes
DigitalOcean, Vultr, Linode: $0.02 per GB over your transfer limit
OVH $9/month VPS: 100mbps unlimited bandwidth, and yes, OVH doesn't care if you have 7x24 100% utilisation on your 100 mbps.
Let's say you have a 100MB video that gets 20,000 views, and half of the viewers end up streaming the full video.
BW incurred: 1 TB. Cost to you: $20