Yes I already did that before. They all show roughly the same numbers around 34.
It seems that there is something REALLY hampering your speed.
Is it at all possible you could try using an Ethernet cable instead of WiFi? That would help narrow down which way to go from here. Even if it’s just a temporary cable running across the floor for a few minutes to test the speeds with.
@Stephan974 , are you having problems or just showing what you get for speed tests?
This is a strange problem. Could you run the video that is giving you problems through MediaInfo and post the full results?