TheRoland,
What are your training goals? Your objectives for all the training? Define your mission (goals) and then you will be able to define your training.
For example, if you are training to be more competitive in USPSA your techniques can be different than if you are training for IDPA or self defense. The short-term goal is the same for all three: get the gun running ASAP, but the techniques are varied.
Generally speaking, faster is better for clearing all stoppages, including reloads. But those videos you watched showed professional shooters using specialized competiton gear to perform those sub-one second reloads. That is certainly impressive, but not realistic if you're shooting from concealment.
You should be improving your times no matter what you are practicing. You will get the best help from a professional instructor, but you can do quite well on your own. Go visit
www.pistol-training.com and find their "drills" page. They have lots of good info that might help you. If you don't have one already, get a shot timer.
Practice correctly. When you practice, either at home or the range, set your goals for that session before you start. Hold yourself to those standards. Eventually, you'll get to a training plateau where you arent improving any more. If you havent had recent, quality instruction at that point, then it is time for some. A person watching you can help you much more than you can help yourself.
Good training.