I believe PAL captures at 720x576. I am an NTSC guy here in the states so thats about as much as I know. With any computer thing going to video remember that text should be thicker than normal because the resolution is not as crisp as a computer monitor.
I also forgot about safe action areas. Video monitors crop the edges of the video. TVs do this in different amounts. You don't want to place information on the edges. I found this page [learndynamicmedia.com] online that has safe action area templates for photoshop in both PAL and NTSC. It looks bad if you have cropped text at the top so take your safe action area into account.