Very confused About Qt5 and Phonon/QtMultimedia

[aguayro]

Hi, i've been reading and googling about Phonon and Qt5, and i'm very confused.
Do i need to install any module? Where can i download it? have i to compile it?
Can't find clear information about it. Some places says it's no more included in Qt5, but i seem to have the headers if i type <QtMultimedia> in Qt Creator,... but, i get error when compiling:

error: C2079: 'videoPreview' uses undefined class 'QVideoWidget'

error: C2079: 'videoPreview' uses undefined class 'QVideoWidget'

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Coul somebody help me with this?