from what i read somewhere, the htc one m8 is ipx3 rated. pretty much means that rain, splashes of water won't damage the phone. the whole submerged in water for 90 minutes deal, now thats a little extreme
EDIT: "The HTC One (M8) IPx3 rating means it's protected from water spray up to 60 degrees at 10l per minute, pressure of 80-100kN/m2 up to 5 mins" link here
And what if that was mineral oil instead of water? That would explain it working. After all we didn't actually see him fill the sink.
Im not surprised, I dropped my Droid DNA in the lake and it sunk a couple feet before I could get it, and worked like a charm after that. Then later on when I tried to tear the phone down to replace the screen I found out it had a rubber seal around the outer edge of the phone.
I saw this clip before i ordered my M8 unit, however if u keep searching, there is another youtube clip doing a comparison between the iphone 5s , galaxy s5 and the HTC m8. In one of the tests he makes a water test of submerging all 3 phones. The M8 did indeed kept on working BUT the speakers stopped playing music... something you dont see in this video...
so im guessing that the speakers will be the first to go when in fact tasting water...
Im not surprised, I dropped my Droid DNA in the lake and it sunk a couple feet before I could get it, and worked like a charm after that. Then later on when I tried to tear the phone down to replace the screen I found out it had a rubber seal around the outer edge of the phone.