Qmlvideo example bug Qt 5.15.19

Reproduced with Qt 5.15.19 on Linux Ubuntu 18.04, configure and compile example.

Directory: Qt_5.15.19/Examples/Qt-5.15.19/multimedia/video/qmlvideo. Example opens, but videos doesn't start playing. Creators application Output logs: 

QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }

 when starting video (tested with mp4 video that comes with example).

Steps: 1. Open app 2. Select video 3. Click "Video".