Support 'com.widevine.alpha.experiment' key system

[Jason239]

In the initialize() function of src/streaming/protection/controllers/ProtectionKeyController.js, the keySystems variable is structured to create a list of four predefined key systems and no other key systems are allowed.
However, Widevine L1 support in the Windows Chrome browser currently requires the com.widevine.alpha.experiment key system to be set up.
Is there any other way to set up this key system?

[dsilhavy]

You can define a list of key system string priorities. Please check this example and let me know if it solves your request: https://reference.dashif.org/dash.js/latest/samples/drm/system-string-priority.html

Documentation: https://dashif.org/dash.js/pages/usage/drm.html#key-system-string---priority