Everything we need to debunk his testing is right in front of us. He even says so in his video. Look at this Tuner he is using for "measurements:"
1. He has set this Pioneer Tuner to FM and tuned it to 104.5 Megahertz. A Megahertz is 1000 Kilohertz (likely a local station). So this is more than 5000 times higher than the highest frequency we can hear!
Think about: if we could all hear FM radio, we would go nuts! All those stations transmitting going right into our ears as sound? It would be insane.
So receptivity of this frequency has nothing to do with audible noise.
2. I also circled the "tuning" meter. Unless it is broken, it is indicated that he had on purpose tuned to a local FM radio station that was so strong as to be picked up with the short wires he had taped to the top of the unit. So naturally, adding more wires to them would increase reception ability.
3. It is 100% true that twisted pair wire provides resistance to noise pick up. THis is why they are used in Ethernet cables, HDMI, etc. So showing that they act less as an FM antenna is telling us water goes downhill.
4.
The main problem with his test is that there is no speaker at the end of the "speaker wire!" If you put an 8 ohm load on the speaker wire, its ability to pick up FM stations will go down to hell. As he tested, they are very high impedance (i.e. just air and resistance between them) and hence the reason they make good antennas.
Again, think of how deaf we all must have been all this long to not hear our local FM stations on our speakers (as noise or otherwise). Not possible because the loading of the circuit by the very low impedance of the speaker makes it so.
All this time I thought he understood something about electronics. This tells me that he lacks even the most basic understanding of circuits, electronics, etc. He is presenting a parlor trick which is so easy to debunk.