Comment 3 for bug 1441055

"Build and include qt-mobility (or the needed QtMultimedia module) in the OpenLP bundle (described in the blog post above)." This solution has been known to OpenLP devs for quite a while, so I think this can be ruled out.

I would suggest disabling the replace live background button if webkit is not available. IMHO, this feature leads to a bad user experience. Especially if the user has got OpenLP set up to use VLC, in which case videos that play through VLC as a media item, may not necessary play as a live background using webkit.