This is pretty funny, but it could be funnier if something in addition to the audio was used.
The animation quality and lip synching was actualy good when it went with the audio.
It would have been funnier if you did the following:
when the "I fart in your general direction" was said, if the french soldier turned around and farted, even if not using a fart sound effect but instead a fart cloud graphic that would have been great.
And the other insults could have had more hilarious results if there was use of props or actions associated with them as well.
This was good regardless. I acknowledge your talent and skill in animating regardless. You'll no doubt improve and get better over time.