How did you reach this number?
Don’t be fooled by the average bitrate number. That’s quite misleading for streaming purposes. You need to take into account the bitrate “peaks” of your file.
Plex does a thorough analysis for peak bitrates, if you let it.
You can find the results of this analysis in the Plex media info XML.
More details here: What is Media Analysis & Do I Need It - #8 by OttoKerner
and here: Streaming brain and buffer size - #2 by OttoKerner
