Wasn't bad
A little bit choppy in spots, but the only real problem I could see was with your lighting.
If you can light your subject(s) with at least 2 of the basic principles in place it will look better.
Get a key light in place (frontal light) it does not have to be straight on, as long as it lights the subject just left or right of the camera angle. The key light can also be behind the camera & to the left or right side of the frame.
then use back & or side light (fill ) you can light the back or side & try not to be too toppy, if your directly over the subject you again can cause problems.
Often side light is just a white piece of material (paper, foamcore, white cloth etc. that bounces the ambient light in a controled way.
You can easily try bouncing light and seeing how it works ,by takeing a white card allowing light to hit the card & by tilting the card to the left & right or/also up & down near say a friends face to give you the desired effect of fill.
Always remember that when ever you are doing a stop motion film, relying on the Sunlight will always let you down. The sun moves(actually the earth does but....) & with clouds & other factors your lighting will have diferences in intensity. Always be aware of your shadows, good lighting is always done with the intensity (hard or soft) & how shawdows look in the frame.
Good luck