One-page reference to the four core viewership metrics (plays/views, watch time, completion, concurrency) plus unique viewers and reach: each metric's honest definition, the counting trap it carries, how to count it honestly, and the peak-concurrency-to-bandwidth arithmetic that sizes the delivery bill.
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The handbook · 7 volumes
Fora Soft Video Engineering Handbook
This checklist defines viewership metrics honestly: plays, watch time, completion, concurrency and reach, the counting trap behind each and the peak-concurrency arithmetic that sizes the delivery bill. Our seven-volume handbook covers the delivery behind those numbers: Volume 3 on QoE, CDNs and streaming economics, Volume 2 on HLS and DASH, and Volume 1 on encoding. Written by Nikolay Sapunov, CEO at Fora Soft.
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