Cover of "Agape"

Hello, I want to make a piano cover of the song Agape by Bear's Den. I've already looked in the internet for a music sheet but no results.

I found a video on youtube of a cover which sounds perfect, however I can't see properly which chords he's playing and there's no music sheet provided.

This is the video

So please, if you could help me I'd be really grateful.

Thank you