I came across a site the other day called "GoAnimate". It allows you to create your own animated sketches by using cartoon characters and converting the text into speech.
At the freebie entry level, you are allowed to create one character of your own from scratch, use a limited selection of backgrounds, and a handful of existing characters. And the time limit for your animation is 2 minutes. If you are prepared to fork out money, you can create more characters, select from a wider array of backgrounds and develop much longer movies.
So here's a sketch I put together using my free character, a basic background and it comes in at just under 2 minutes long.
You'll have guessed I haven't paid for the Pro account yet...
The voices sound a bit stilted - a touch Stephen Hawking - but considering I was able to put this together in a short amount of time on a budget of zero, I'm really quite impressed with the system.
Territorial Markings by kimayres on GoAnimate
If for some reason you can't see the video, then click on the link and hopefully it should take you directly to the site