Dear Alexander, dear fans of Hueman - the best free wordpress theme - ,
I modified the /inc/featured.php in the way you told in this thread, Alexander.
Videos appear perfectly and can be played directly when there are different post-formats in featured content. When I only choose video-formated posts to be featured in Homepage-Slider, the Slider does not show up.
Any ideas, why this happens.
Thanks and a good year for everybody,