Content Delivery Networks often don't publish their pricing. The biggest are:
Some pricing:
Fastly: North America & Europe – First 10tb - $0.12/gb. Next 10GB - $0.08 Asia, South America, Oceana – $0.19 - $0.14 Brazil, India, Africe – $0.28 - $0.24 plus $0.075 - 0.0160 per 10,000 requests https://www.fastly.com/pricing
Worked example
"500kbps stream quality (medium. High is recommended for sports events)
1000 simultaneous viewers
2 hours length
You need 450GB. You pay $0.2 per GB, so your total cost is $90" = $0.09/per viewer or $0.045/hour. So $0.1/gb = $0.0225. Or for HD 4mbps = $0.18
https://www.quora.com/How-expensive-is-it-on-average-to-stream-online-video
700mb SD / 4Gb HD - for a 2 hour film. So Fastly = $0.16/hour
Microsoft Azure $0.087 – $0.05 per GB
GCore Labs €0.0025/GB - 1tb free - limited locations Pro 5tb plan - €0.02 5tb pre-bought for €100 Pro 10tb - €0.015 10,000tb pre-bought for €150 - €0.06/4gb hd feature
Amazon Cloudfront $0.085/GB for the first 10 TB of data
Key CDN North America & Europe - First 10 TB are $0.04/GB Asia and Oceania - First 10 TB are $0.09/GB
Stackpath $0.02/gb - https://www.stackpath.com/
https://www.dataplugs.com/en/how-much-bandwidth-is-needed-for-video-streaming/ 4k: 13–34 Mbps 1080p: 3–6 Mbps 720p: 1.5 – 4 Mbps per person. " 6 percent of viewers leave per second of buffering"
Let other streamers upload some of the data.. can reduce 50-70% of the streaming costs. https://teltoo.com/the-benefits-of-cdn-offload/
"Secure Reliable Transport (SRT) is a rising star in the streaming frontier. It delivers high quality video and audio with low latency over the unreliable public Internet. You can actually control the amount of latency and eliminate issues like jitter due to packet loss over poor networks." https://www.epiphan.com/blog/why-srt-hls-mpegdash-streaming/
"HTTP Live Streaming (HLS) is an adaptive, HTTP-based streaming protocol that sends video and audio content over the network in small, TCP-based media segments that get reassembled at the streaming destination. The cost to deploy HLS is low because it uses existing TCP-based network technology, which is attractive for CDNs looking to replace old (and expensive) RTMP media servers. But because HLS uses TCP, Quality of Experience (QoE) is favored over low latency and lag times can be high (as in seconds instead of milliseconds)." https://www.epiphan.com/blog/why-srt-hls-mpegdash-streaming/
"MPEG-DASH is an open standard, adaptive HTTP-based streaming protocol that sends video and audio content over the network in small, TCP-based media segments that get reassembled at the streaming destination. The International Standards Organization (ISO) and the team at MPEG designed MPEG-DASH to be codec and resolution agnostic, which means MPEG-DASH can stream video (and audio) of any format (H.264, H.265, etc.) and supports resolutions up to 4K. Otherwise, MPEG-DASH functions much the same as HLS." https://www.epiphan.com/blog/why-srt-hls-mpegdash-streaming/