Remember Weebl? He's still occasionally appears and just did a series of Christmas videos. Like this and this.
Would you like every moment of the rest of your life to be filled with terror? Try listening to this extremely catchy and disturbing song from a beloved, classic Danish Christmas special: We are prepared to die, Yulerman.
The Mellotron was an early 60s synthesizer with an eerie sound that was used in Strawberry Fields, among others. Watch this super interesting video where an awesome mechanical genius shows the inner workings of a Mellotron she repaired.