Yes, the zoom and picture quality are great features to have when shooting sports photography. It also has a feature where the camera anticipates the photograph to eliminate blur. I've used it for basketball and bowling (in low-light conditions) and it works great.
Sorry, you won't be able to plug it in to charge and still be able to record video. You'll see an error message on the screen that says "Only playback possible during USB Power Supply." You could, alternatively, buy a spare battery and charge the original battery up until it is full and charge the second up as well and then just swap batteries, but that would force you to break up the video because of the change in batteries and would lose some of the event you are recording in the time it takes to do that. With that said, there are also limits to the file size and/or time that you can capture in a single video as well, so you'd have to break it into smaller recordings at some point anyway with that partially dependent upon the size of the memory card you install and use.