Is there an Application Builder widget to display streaming video from an IP camera supporting RTSP protocol?
There is a video widget currently but it does not support RTSP as I can tell.
Error messages / full error message screenshot / log file:
Question related to a free trial, or to a production (customer) instance?
I do not think there is such a widget but I you want to add such functionality to the existing widget, you are more than welcome to contribute that.
Regarding Application Builder, please notice that it has been deprecated and will not receive further development:
Note that most Application Builder widgets have been ported to be available as UI plugins for Cumulocity Cockpit as well. This includes the Video widget: