Great app, love, but unpleasant surprise – MeteoEarth Review

Checking weather this AM, suddenly I and those around me (quiet space, quite embarrassing) were startled by a loud video which spontaneously played. A glitch? An ad? Surely a mistake. Quickly swiped out of the app, will be more cautious about where I use it in the future. Please fix, would be most grateful. BTW, excellent app otherwise.
Review by Peaceful summer on MeteoEarth.