Decent animation - some factual errors.
The animation was good, but there are some factual errors you may want to take care of.
In the beginning of the narration, you do not speak as clearly as you could. Furthermore, it sounds as if you say "protons and neutrons ON the nucleus". The nucleus is composed of protons and neutrons, so you could say that they are "in the nucleus" or that the nucleus is composed/comprised of them, but to say that it protons and neutrons are "on" the nucleus sounds inaccurate.
Water is the most abundant molecule on the earth's -surface-, because the surface is covered by about 70% water. However, the most abundant molecule on earth may very well be something else depending on how you want to count it. I believe Nitrogen is naturally diatomic, for example, and it comprises 78% of the atmosphere. There is also the considerable bulk of the earth itself - you may want to do some research to verify your claims.
When you say that what you are breathing in is "oxygen", this is partially accurate, but oxygen only comprises 21% of the atmosphere. The remaining 78% is nitrogen.
Astronaut and SCUBA air tanks may or may not contain pure oxygen depending on the needs of the exercise. Pure oxygen tanks can be somewhat hazardous, as pure oxygen is flammable and breathing pure oxygen is not always a great idea.
There may be some other factual errors.
Were I your instructor in a standard class I'd give you a 90%. In an honors class I'd give you an 80 - 85%. (82.5 if you pin me down.)
Good work.