Differences were definitly there when listening through headphones (Audeze LCD-X with Chord Hugo and laptop), listening to youtube over speakers (to other systems recorded by microphone) doesn't work IMO, that way you basically listening to two different room acoustics on top of each other.
Alpha audio uses some good equipment to record their "reference" system, off course listening over youtube is not same as being in the test room, over my headphones it is difficult (better say imposible) to say anything regarding soundstage, depth and height, but in most other parts I could hear differences between the cables.
Before seeing the results, I preferred the van den Hul and Shunyata options, both belong to the top of the list of the measurements Alpha audio made.
I was planning to only listen in for half an hour, but in the end I listened till the end, I will not go and order new speakercables now, but I did enjoy the effort that Alpha audio put into the test.