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The original band version is here: https://youtu.be/y6120QOlsfU

He really likes that carbon fiber guitar.

If going by this, it's apparently in standard tuning.

Luca Stricagnoli: "Sandstorm" (Darude) ... https://youtu.be/Dw-tfXrI890

The original vocal/band version is here: https://youtu.be/6Q0Pd53mojY

Casper Esmann: "Nocturne" (Jay Chou) ... https://youtu.be/tC_SOIE2-3s

The original vocal band version is here: https://youtu.be/oRdxUFDoQe0

Josephine Alexandra: "Beat It" .(Michael Jackson) .. https://youtu.be/1lyDsly8sMg

The original vocal/band version is here: https://youtu.be/jpmiZ7zsHXY

TUNING: C-G-Eb-G-Bb-Eb (rolling capo)

Kent Nishimura: "Invisible Touch" (Genesis) ... https://youtu.be/Okuc7xQG9G8

The original vocal/band version is here: https://youtu.be/CAEU1yANRSY

Standard tuning

Justin Johnson: "I've Been Everywhere" (Johnny Cash) ... https://youtu.be/e6AC1dXgK7g

Going to assume it means "To Be Honest". At any rate, it's a typical good to excellent solo instrumental arranged and played by Jung.

The original vocal/band version is here: https://youtu.be/phsDrsw-tzc

It's in standard tuning, with a rolling capo moving/switching from the 5th fret to the 6th at a later point.

Sungha Jung: "T.B.H." (QWER) ... https://youtu.be/ialBJff6WyA

The original vocal/band version is here: https://youtu.be/NdYWuo9OFAw

Erin G.: "Iris" (Goo Goo Dolls) ... https://youtu.be/r8vyWSxTn34

The original vocal/band version is here: https://youtu.be/cJunCsrhJjg

Tommy Emmanuel: "Purple Haze" (Jimi Hendrix) ... https://youtu.be/apXSU8F8zWs

The original vocal/band version is here: https://youtu.be/xOp1DAh_8DA

Gabriella Quevedo: "Thank You For The Music" (ABBA) ... https://youtu.be/t-J56XXfBu4

The original vocal/band version is here: https://youtu.be/2lvs2FzF64o

Thomas Zwijsen: "Holy Diver" (Dio) https://youtu.be/s8ARcfplk60