Master Slider on Bellevue theme

Hi we have download the Bellevue theme and trying to add a background video using Master Slider but due to some reason its not adding videos. i saw one of your support request that we can add video as we have master slider pro with this theme. can you please let me know what i am doing wrong>

Please anyone help as soon as possible on wordpress plugin page its also showed Master Slider pro

For theme specific queries you should ask the author