Note: You can only have one YouTube playlist per post/page.
Static YouTube playlist player
[yt_playlist mainid="xcJtL7QggTI" vdid="xcJtL7QggTI, AheYbU8J5Tc, X0zGS4-UKgg, 74SZXCQb44s, 2M0XCH9q3YI, CTNgVQGLy24, B8RpvoHsgI8"]
YouTube V3 API playlist player
[yt_playlist_v3 mainid="xcJtL7QggTI" vdid="xcJtL7QggTI, AheYbU8J5Tc, X0zGS4-UKgg, 74SZXCQb44s, 2M0XCH9q3YI, CTNgVQGLy24, B8RpvoHsgI8"]