That said, Qt5Box v0.2 is all about Qt5 alone - no QtMultimedia, QtWebkit - and in even though QtMultimedia currently doesn't seem to support video acceleration (and with QML as well), it still manages to get something done if the video is SD.
Maybe there are some applications at present, concerning SD Webcams or SD video playback - that would be accessible.
So Qt5Box v0.3 will at least have (hopefully) GStreamer integration which is pretty straight-forward, and as for Webkit, still considering if that's an advantage as well!