VideoWidget prevent warnings
VideoWidget prevent warnings

Such as:
(dolphin:443671): GStreamer-Video-CRITICAL **: 09:44:16.741: gst_navigation_send_key_event: assertion 'g_strcmp0 (event, "key-press") == 0 || g_strcmp0 (event, "key-release") == 0' failed

Ref: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1139#note_1384347

KDE/phonon-gstreamer,KDE/phonon-gstreamer