The chart is a list of the most popular music on YouTube for the week. While the charts are monitored on a Friday to Thursday cycle, and updated on Tuesdays, they are dated the Saturday the week after.
BTS's "Spring Day" was at #11 for the week of March 4th, and for the week of March 11th, both TWICE and BTS charted! TWICE's "Knock Knock" debuted on the chart at #8, and BTS' "Not Today" debuted on the chart at #10.
Congratulations to both TWICE and BTS!