I am a beginner piano student (by my own). Studying the sheet music for the song "The cranberries - Zombie" I came across to this part:
(G and F clef) Talking about G clef: What I understand is, you play D and B (same duration, 1/8) and then C. But on the interpretation of the score on this youtube video, it seems that there are two voices, since D has the duration of a quarter note, and B and C of an eighth note. Shouldnt D be written with the stem pointing down? (since it has a different duration as shown on the video). If the sheet music corresponds with the playing on the video I linked, how can I know D has a duration of a quarter note on the sheet music I attached).