Not bad transitions, but your kills are too singular you need to throw some multiple kills into video like this with the music you've chosen.
Quality of the video is actually good, i'd defiantly watch a 20second video on youtube on how to blur / pixelate would clean up your video a lot instead of having black boxes.
I would highly recommend choosing a different song as your video is too slow paced for the music chosen, otherwise nice video i look forward to more!