The first thing to do when trying to become a video game tester is to get past the fantasies and the myths. The reason why many gamers want to become paid game testers is because they are under the impression that it is some sort of fairy tale job. That's not to say it isn't a dream job, it's just that it is far from a fairy tale career.
Contrary to what you may believe, a video game tester is not paid to sit down and play all of the newest games. It's true that he may actually get to play the newest & most technologically advanced games, but that is just a perk of being a professional video game tester. The truth behind game testing is that testers are paid to test video games, not to play them and have lots of fun.
The companies and developers that hire you are paying you to test games, period. If you have fun while doing so, that's fantastic, as you are literally being paid to have fun. However, that doesn't mean much to the