I get all kinds of podcasts etc as results too while using

$imdb->search('Blabla', [TitleSearch::MOVIE])

For example this one: https://www.imdb.com/title/tt23547604/ which shows as a "Podcast Episode" but comes back with #main_movietype: "Movie"

Also had this one just popup: https://www.imdb.com/title/tt28856207/ another podcast.