Cross Correlation 

you're the best. short, simple, clear, got what I want, thanks

I loved your explanation !! How you simplify the idea and give small demo! That was GREAT! Thank you and keep up the good work in your channel :)

Holy shit that video was incredible, what the fuck

Thank you, for this clear and net explanations.

I loved the video, your voice is so soothing!

Good stuffy dude, really well explained and illustrated. Not to fast of an explaination or too slow, and the introduction section gave a good stage for the follow up material covered. Your mic quality was sub par and it took alot of the expression out of your voice so things sounded a bit monotonic, but the information still got across well.

Well-Done but you might have left-out normalization of the signals