A few years ago i make a presentation with only one HTML 5 page with the public transport info for my students:
https://www.glropendashboard.nl/reisfeed.
This page shows fullscreen with all the info on one screen.
Recently i wanted to add a new HTML page (another public transport page) to a new presentation on a different screen.
https://www.glropendashboard.nl/reisfeed/?locatie=vmbo
The problem is that black bars appear at the top and bottom of the screen. Both BA-players are the same players, same monitors and the presentations are the same (1920x1080, both video and image mode are scale to fit). Could there be something in the presentation? The web pages look the same on my computer screen.