Looking for advice...
Point and shoot cameras have adequate film quality when used at low zoom and decent lighting, but their use is limited.
To give him the best start, get the budding videographer a dedicated camcorder.
I haven't got a camcorder so not much could tell about the quality of the SX30. But probably a lot difference as Mario said. For the download part, it's easy. Simply download the file by the provided cord or using a card reader, same procedures as if you're downloading the picture files, i.e. just copy & paste to any folder in the computer or follow the steps indicated in the Canon browser.
Since you haven't done it before, suggest you try once then you'll have some ideas of how it goes and whether the quality works.
It's good you're happy of the SX50, cause I'm going to upgrade from the 30 to 50 too. That give me a push.