The first part of the video is utter bullshit. There are many stages of lucid dreaming, and usually realizing that you're dreaming causes you to awake from it, and...wait. That's not correct. We all dream multiple times a night, but our mind tends to forget anything but the last one (and even then...dreams are often hard to remember if you don't actively try to do it, eg by writing it down).
So not only does it require practice and you will also need to make time to REMEMBER these dreams, in most lucid dreams you don't have complete control over everything. It's one thing to realise you're in a dream, but something completely different to actively steer what's happening to what you want. The few times that I was lucid enough to control my own movements and make an attempt at flying often sort of failed somehow.
and if that first part is bollocks...why should I believe a word of the second part? They don't even have testimonies from witnesses, let alone scientists!