For the most part, very good.
Animation and artwork are great though I did see times when the animation kinda look a little lazy (e.x. shifting between 2 frames while flying and those frames just move left and right) Audio for the most part is great though at the end the music drowned out the voice acting. I suppose the plot is suppose to be the same as an episode of DB (despite me not watching the show)

Really good. I also suggest to clean up the white lines visible on characters in some frames.

You seem to have a lot of potential but you appear to need much stronger reference material.

I recommend getting art influences outside of animation, comics, anime, ect

Study the influences of your favorite artists as well.

You are already studying the classics such as Dragonballz and other older cartoons.

Add real life as an extra influence to add more accurate anatomy to your drawings.

Study how real people look and human anatomy will become much easier to stylize.

study the muscles in arms, legs, torso and how they fit together.

Study the human face to understand how the facial features connect together.

Study everything until you don't need the reference anymore.

You already built a lot of muscle memory from drawing dragonballz characters.

You will already naturally get better at drawing dragonallz characters but you can always excel farther.

You can also study lights and shadows.

Think about where the light is coming from before adding shadows.

The shadow on frieza's neck and under the face does make a lot of sense.

I seen shadows on the necks of real people before.

observe real life and compare it to anime.

You will notice that a lot of anime uses real life observation in it's drawings sometimes.

You got some really great early work.

You'll create brilliant work with a bit more slickness and refinement.

Keep going.

-Mightydein