Things that need improvement-

~Layout
~Time Limit
~Video quality
The layout you chose was ok, except you can be much smoother with design, making more circular objects than box like ones.
The time limit is pretty crappy. Im not going to lie. You can improve that by making it endless, duh!
Finally, you can also add slow motion/time lapse for a cooler effect!

EMOX 1012 about Dubsmash - Videos & Music, v2.3.1