Here is the following video that i saw (really great video):
Nevertheless, I do not understand why a close conductor (first part of the video) can not propagate a electromagnetic field when we applied on it a sinuisodal signal. Actually, I know that according to the ampere's law an alternating current in a wire induce a fluctuating magnetic field around the wire and vice versa. Finally, according to the Maxwell's equations, if we have a fluctuating magnetic field, we have an electric field, and if we have an electric field we have a magnetic field and so on, so why it doesn't propagate ???
Thank you very much !