What is this instrument?
 

Hello. I would like to ask you about the instrument that the main riff is played on in this song. I have learned the part by ear on an acoustic guitar but think it's not a guitar. Also I think there are actually two instruments from the very beginning with a third one entering at 0:23 (banjo?).
Thank you very much! I hope this is a suitable thread.

https://www.youtube.com/watch?v=t89NKH45dz0

Definitely banjo