Update: this is due to the weird way in which global elements work…this is what happened.
I added a video element and configured it to be how I want: auotplay, loop, mute, byline, title user portrait all OFF, and a nice big “play” icon overlay to make it easy to play the video.
I thought "I’m going to want all video embeds on this site to look the same, so I’ll create a global element so I can re-use the configuration by adding the global element in the future and just change the video ID without having to configure the whole element each time.
I then added the global element in multiple places throughout my site.
After getting very frustrated, I realized that my expectation was that global elements were like element “templates”, allowing me to apply a global element in the future any only change the aspects that are different.
I now understand that changing any aspect of a global element changes all occurrences of it.
It would be really great if you could de-couple a global element instance so it could be used as just a template, as I expected.