Tip 1. Recording your video with a good camera (reflex cameras are amazing) gives a really good results, but if you don't have it, and you don't have money enough, you just can record your video using a phone, or a webcam, but adding a good ilumination (you can use your own lights you have at home)
Tip 2. Do lots of videos, and then select the best one(s) and edit the video with easy progams, like Windows Movie Maker.
Tip 3. You'll do a better video if you add some music. To don't have problems of Copyright, I recommend you to use Royalty Free music (
http://incompetech.com/music/royalty-free/collections.php). Also you can add effects to your video.
After film your flourishes, practice a lot the flourish, and try to get a smooth movement, trying also to combine velocities.
I hope you'll do a awesome video!