[BUGFIX] Wrong viewHelper is used for rendering videos

Change-Id: I1afcbfd9f1c737b107ef4d3c7ca6b1eb249e300b
Reviewed-on: http://review.typo3.org/32658
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>