This is getting frustrating. You know, there's something funny about that video. I tried putting that link in the browser, removing the space of course, the page loaded, but the video wouldn't play, with a spinning roundel showing behind the YT logo in the middle of the video and clicking it doing nothing. Even a page refresh did the same thing.
Tried pasting the link again into a new tab and this time it worked. However, I can't find that video in Google search results now. I previously found it by simply Googling "Daruso - Since You Been Gone" without the quotes, but now nothing, just the original and some other mixes. Even putting club mix at the end finds nothing. Click the video tab in the search result, obviously. Given this, I think that YT are intentionally restricting it in some way and it wouldn't surprise me if it stops playing for me at some point, too. Or maybe, YT's restrictions have just gone haywire and will self correct in time. All I can say is that at this point it still plays fine for me.
Have you tried using one of your other PCs? That way, everything is different other than the ISP or VPN and it might just play. You could try with your smartphone on the mobile network, too.
Finally, this club mix came up as a hit on beatport.com where you could buy it for a small amount of money, full .wav CD quality too, which I'm thinking of doing. You shouldn't have to do that just to check it out, though.