Problem :
Our users reported that they cannot play our Vimeo videos on iPhones / iPads.

We tested on an iPhone 13.
Tested with Safari normally. Cannot be played.
Tested with Safari in private window. Cannot be played.
Downloaded and tested with a newly installed Chrome. Cannot be played.
Number of affected videos > few hundreds

Work fine on Window and Andriod devices with both Chrome and Edge.

For example:

 

This is what we see. Keep hanging at 00:00.