Yes, it is. Sorry, but you are using the wrong function. The values are in the wrong place because they are echoed at the point where the function the_feild() is called.
Example:
// this will output the value of a field here
// and set $value == NULL
// because the_field() does not return a value
$value = '<p>The value of the field is echoed here ('.the_field().')</p>';
// this will echo the <p> with nothing in the ()
// because the_field() already echoed the value above
// and returned NULL
echo $value
I won’t go into the issues with using ‘the_terms()’ in the context that you are attempting to use it. Removing that from one of your lines what it should look like is this
$ouput .='<div>'
.'• Erscheinungsdatum:<span>'
.get__field('produziert')
.'</span>• FSK: <span>'
.get__field('fsk')
.'</span>• Filmlänge: <span>'
.get__field('filmlaenge')
.'</span>• Schauspieler:'
.'</div>';
echo $output;
the_field()
get_field()
