I have my search and watch history off and I watch recipes and music videos. The right panel with recommendations is always filled with right-wing videos. Even if opened in an incognito tab.
It's not the algorithm... It's how YouTube have been prepared on purpose.
Singers:
Amanda Somerville (Trillum, Exit Eden, Kiske/Somerville)
Marcela Bovio (Stream of Passion, Mayan, Dark horse/White horse)
Bands:
Kobra and the Lotus - Heavy Rock
Stream of Passion - Progressive Metal
Tardigrade Inferno - Cabaret Metal
Volturian - Symphonic/Pop Metal