How to Watch Movies?

This behavior was changed back in 2017…

Fri Sep 22 12:16:34 CEST 2017 - ma@suse.de

- Default to 'solver.dupAllowVendorChange = false' on SLE15
  (FATE#323478)
- Remove unused legacy notify-message script (bsc#1058783)
- version 16.17.1 (0)

Internal binary default is true, but the default on installed system is false and that is what matters.

Well, I think this problem may be because of the unavailability of libraries and codecs. Therefore you can install all required libraries and codecs and then try again.
Thanks