I think it's allowed to share via the internet the same as if someone was right next to you.
But - is it right? To sing the same composer all the time? Probably not. You should be famous by now. I even am writing all sorts of things again. I mean like poem type stuff. Posting it on my blog and YouTube.
I might go participate in karaoke sites and then post it to YouTube or something like that. I'm still loading videos for me to listen to and have left them open as of now cuz I think it's allowed. I want someone to tell me. I put a note in my songs.