I don't think this is a good key for you. Can't decide if it's too high or too low, but something about it isn't sitting right in your voice.
You're a dude - so I'm less familiar with how your voice works than I am with women's voices. That said, I think there's something a little funky with your technique - there are a couple times when you'll say a word or a phrase, and you sound like Kermit the Frog and/or like you have a head cold.
What I believe is happening is that you're keeping your throat open and your palate raised (which are good things to do!) but you're not letting any of the tone resonate in your sinus cavities. Most untrained (and some trained) singers have an intense fear of sounding too nasal and getting an annoying twang in their voice, so they hide on the other end of the spectrum - which doesn't sound much better. There's a bunch of wide open space in the sinus cavities, and singers use that space to color and amplify their voices. It's that space that makes you sound like 'you.' It isn't the vocal folds/cords at all.
Funfact: If I took Luciano Pavarotti's vocal folds or Barbara Streissand's or Katy Perry's and put them in my throat, I would still sound like me. Now, If I got a head transplant or had my sinus passages surgically altered to replicate another singer's sinuses, then I'd sound more like them.
Long story short - don't ignore your nose. By leaving it out of the 'singing' equation, you're messing with what your voice should sound like.
Also, there's something to be said for supporting your voice. You're... generally on pitch. At the beginning, your lower range has a tendency to fall a little flat (but it's fine when you harmonize.) Make sure when you're singing that you're standing and that you're using your abdominal and back muscles - not your throat.
Speaking of which, your voice is also sounding a little raw - are you sick? Did you do a lot of takes before recording? Take care of your voice. Intentionally creating that raw sound or singing until it naturally has that raw sound can be very damaging to the vocal folds.
All that said, nice job with the guitar work and the harmony, it's a very nice touch! The hard work you put into it really shows through here. There's always something we can all work on, and this is a great start. Good for you
smile 
