What does it mean when a guy sends you songs?

So I have this guy friend that I've known from work. He's like almost 20 years older than me and we've gotten along well even when he quit working there. I'm just curious since sometimes he sends me songs via text. If I'm in a bad mood, he sends a song to me. If we're just having a normal conversation, he randomly sends a song.
They're just links to YouTube videos that are pretty much Korean ballads (most are about love/heartbreak/etc) and he doesn't really say anything like "thought it was cool, give it a listen". One time he sent me like 6 links to listen to, they're all lovely songs by the way. The latest one he sent me (which was yesterday when I was asking him if we could hang out next week with another friend of his) was from this drama that I know. All I remember seeing is a lot of hugging in that one. I don't think he's the type that would really scrutinize the lyrics however, but then again I don't know everything about him...

Could this pinpoint to anything? Just wanted to get some opinions on this 
What does it mean when a guy sends you songs?
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