Video playback gem can't add video

I was able to install the gem and run the editor without errors. However, I am unable to add the video snippet to the line. I practiced several formats and none came up. How to fix this and what’s the matter?

Is there any error message in the console window?

no, no errors and nothing at all happens in the console

I tried and got same result, the pick window just closes, but Video field stays empty.
However, tried with script canvas, and it worked with video playing on the entity as expected:

Set this script to same entity that has the video playback component.

Don’t forget to setup material as described here:
Video Playback - Lumberyard User Guide (