Welcome. ^^
And the opinion: I like it, it's quite good. The guitar playing is great. I love the variety, the anticipation, tension.
The voice is pretty good, too.
Finally, the critique: It sounds like you're completely disconnected from your body. I was going to say you're singing from your shoulders up, but the more I watch, the more I think it's more like you collar bone up. Your shoulders are no longer part of the picture. It's great they're not moving, that's a whole other aspect we don't have to talk about right now, but it's also that much more of your body sitting on the side lines. I like the character for the song (though admittedly I haven't heard the original), but you can maintain the sound with better posture and support.
I know plenty of people who can sing from apparently lazy poses, but they're just that: poses. They have a shitton of practice and training and practice to still engage the monster-like support hiding behind their folded arms and cocked hips. Prop your computer on the washing machine placed so conveniently behind you and try your next recording sitting on a chair or standing. Don't slouch or cross your legs. It will automatically open your torso up, and inherently give you more to work with. Then try breathing from your stomach instead of your head and shoulders. We can forsake the quaint background for the health of the body.
