If you look at the video (1st frame) without playing it is gives a tell-tale sign for the ticking around (US driver side front). Mine sounded just like the video. Here's what I'm seeing from the video.
1) The upper (exposed) tensioner top is rust covered. This tensioner may not have been replaced when the engine received the enhancements shown in the video. Personally, if I had spent big bucks making all of the other enhancements to that engine, I would have replaced the tensioner as the seals inside it would be suspect.
2) It looks like a bit of RTV may have oozed out from where the gasket should be under the front if the tensioner cap. Using RTV to seal the tensioner cap is a huge mistake. Only a gasket should be used on the upper tensioner cap. RTV will ooze down beside the tensioner shaft and block oil from flowing through the tensioner oil passage.
So I had to learn that one the hard way. The chain would slap against the head mounted guide and make a ticking noise that sounded to me like a bad lifter. I had tried all types of lifter (snake oil) remedies without success.
Finally I took the Q to my neighbor and (Q45 master tech at G50 introduction) to get a lifter replacement. He pulled the (US driver side VC) and said there were no lifter issues. When he pulled the upper tensioner and found RTV blocking oil flow. The oil flow blockage allowed the chain to slap the upper head mounted guide. He cut a new gasket from gray gasket material and reinstalled the tensioner. The noise immediately disappered. Note: there are no oil leaks around the tensioner cap almost 2 years later.
I'm still kicking myself over that one.
Here's a pic of the(US passenger side) chain with slack. If the tensioner does not remove all of the slick (like it did in my case on the US driver side) the chain bouncing off of the head mounted guide made a tapping noise.