Not sure if this is the right place or not, so apologies if it needs to be moved.

I'm looking at streaming a sports game, we have access to a video camera which will serve as a "webcam". We're probably going to use ustream.

The questions I have are:

-Is there a way to overlay graphics, like a score? I know that it can be done via the ustream app, but it costs $200 and we're only a small sports team with limited income.

-Is there a way to insert pre-produced vids, like highlights, during lulls in the game, eg between quarters and half-time?

We can use a Mac or a pc as we have both.

Many Thanks in advance.