Parton’s YouTube channel.The uplifting, breathy tune pumps up the true meaning of the holiday season, as they warble together, “It’s all about kindness, love, and compassion — better to give than receive.”Their duet — plus Parton’s collaboration with Miley’s father, Billy Ray Cyrus, titled “Christmas Where We Are” — is part of her newest, gently produced holiday album, “A Holly Dolly Christmas,” Parton’s first in the genre in three decades.