The Song is "Someone Like You" from Van Morrison. I would like to know the genre of this song and if could direct me to videos where this song is being played using a keyboard/piano, it would be of great help!
As Van Morisson is mainly a Rock artist and this nice song sounds like a ballad, I suggest you to look at the Rock Ballad subgenre.
Then, if you are looking to piano covers of this song, you can try to find ones on Youtube: "someone like you van morrison piano cover". A this time I've found :
Just keep scrolling and you will find other covers...