x Is For xylophone - Lower Case

The video tutorial introduces the letter X, explaining its position in the alphabet and associating it with words like xylophone, X-mas, and x-ray. A story about Dog Jr. wanting a toy x-ray machine from Santa is included. The video also lists other words starting with X, such as xenopus, xiphias, and xystus, before transitioning to the letter Y.

What does X-mas refer to?

What comes after the letter X in the alphabet?