Regrets - but I am rejecting the idea of adding times to the Chapter Markers in the Table of Contents.
I started to add them but the ToC is complex enough already and somewhat hard to read. The addition of many times to each chapter, makes it far worse.
So for now, I am afraid that QuickTime Player is the only option.
FWIW I tried the latest VLC Player and it changed my chapter marker text to gobbledygook...