Gotta still practice the basics as well more advanced forms, the basics reinforce your form and help prevent you from becoming a paper tiger.
There are three stances being utilized here and three hand applications in one movement. Try to see if you can theorize on what the hands could be doing besides punching.
I completely realize it isn't simple when starting out...but a few things will make your videos 5x better.
Lighting,
Position (angle, closeness, height)
Audio(either dubb naration over, or appropriate music)
(And bonus..switch between views. Side view to off side front.)
We have been able to add a bit of spice to our videos using the iPhone5s and the YouTube Capture app.
Best to you!!
Peace!!