here are their profiles:
@thefatrat
@laurabrehm

Mayday (King Duck Remix)

TheFatRat - MAYDAY (feat. Laura Brehm) [King Duck Remix]

ah yes. a classic. all tracks come from the vid linked, snd that vid has all the original tracks linked as well. 

THESE TRACKS AINT MINE

https://youtu.be/Zy_XqrHqpRY

All Tuba Boss Themes

I really really like the opening for Gravity Falls.
(The link says "Buy" but it's actually free!)

Gravity Falls Piano

EdsonTorres PAPERS PLEASE Theme - Orchestral

[No Copyright Music] OKAY - 13ounce

Сержант Дорнан - Младший Идиот

SayMaxWell - Doom - Running From Evil Remix JGjwml - 3ms8

Nightcore - Dixie

Säkkijärven polkka -instrumental

SCP Secret Laboratory -INESCAPABILITY

joel does the funny ghost buster haha ha

I’m just a boy who loves ducks and please listen to my tracks they are nice

I am also king of Duckland

TheFatRat - MAYDAY (feat. Laura Brehm) [King Duck Remix]

King Duck the first