Even a broken clock is right twice a day.
Realistic explanation of LIGO's billion dollar discovery.
What about the hundreds of measurements[1] to determine the "Universal Gravitational Constant", they achieved substantially the same result - all by chance?
This a major point with "scientific discoveries", they are not seriously accepted until they can be verified!
On "Gravity Waves", you will now find that if they are not verified, preferably by others, they may fade into oblivion. Since they seem to give further confirmation to theory that has had a lot of experimental verification, it will be looked on more seriously.
On that video! It might give a demonstration of interference,
but it has nothing at all to do with gravitation waves. There is no connection between gravitation and electromagnetic forces (I have to add, as far as we know, because, unlike many FE supporters scientists do not claim ultimate knowledge).
[1] You might well ask, "Why so many measurements? There are two reasons. One is that because of the difficulties of the experiment. The other is that there are still questions. Yes, scientists do not claim to know everything, they never have!