Keep two different questions
A programme average describes the encoded package over its duration. Peak segment demand asks a shorter-window question. RFC 8216 gives each a separate definition. A single bitrate label in a release spreadsheet hides which question was answered, particularly when a quiet opening is followed by detailed movement.
Imagine three equal six-second segments containing 1, 1 and 4 megabytes, using decimal units. Their individual rates are approximately 1.33, 1.33 and 5.33 megabits per second. The combined average is about 2.67 megabits per second. That average does not make the larger segment disappear.
Do not turn the example into a universal peak formula
The RFC defines which contiguous segment sets are eligible for its peak calculation. Apply that definition to the actual target duration and measured durations. Taking the largest file or averaging a fixed number of files is only valid when those choices match the required time window.
Keep bytes, bits and time units explicit. Include container bytes in the measurement and separate transport overhead from the encoded segment calculation. Avoid claiming that the resulting manifest figure is a recommended household line speed; simultaneous traffic, request timing and available buffer pose different operational questions.
Choose the next production action
If the large segment is expected, the manifest should represent the demand accurately. If it reflects an unwanted encode excursion, inspect that passage before changing the declaration. Lowering only the advertised number changes the description, not the media.
Review both an easy scene and the demanding passage when assessing an encoding revision. Keep the original and revised measurement reports so the reviewer can see whether a change affected average size, local demand, or both. No transfer or playback result is implied by the invented numbers.
Questions answered
Does a low average guarantee smooth delivery?
No. It does not describe every short interval or the delivery conditions.
Should BANDWIDTH and AVERAGE-BANDWIDTH always match?
They express different measurements. Use the values supported by the package and target specification.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.