Finding back Youtube Chess channel

I recent watched an interest YouTube video tutorial about calculation. But I don't remember the authors name and I can't find back the video.
I want to watch more videos from this channel.
The author of the video is young man, Asian looking, and the video was dubbed. Voiced over in English but originally some other language.
I also remember reading the author was also a Chess arbiter.
Can someone help me find back this YouTube chess channel please.

Have you looked in your Youtube history?

I can't find it in my YouTube history but thanks for the tip.

There are a bunch of Links to Calculation Videos at the Bottom of the Page. 

Maybe one of these?

Bishops Bounty Calculation Page 

Thanks for the tips. I find back the video:
https://youtu.be/AmFDHhhPhsI