I don't know how I found this thread, but I am glad I did. I listened with pleasure to all three of the videos you shared,
@NPro.
Right out of the gate, I can say you have a solid command of your voice, you ukulele playing, and the technical aspects of recording yourself and producing your videos. Everything sounds and looks great, so you should really be looking to share your talents widely.
Performing in front of an audience can be daunting at first, but it gets easier with practice. Mistakes will always happen, but as you get more used to performing, you get better at ignoring them and continuing to move your performance forward. Give yourself some time to get used to it, but get out there and sing.
Eventually, someone will take a video of you performing and share it with you. People share such videos with me all the time. They can be hard to watch, at least to me. When you are ready to do a little constructive self-critique, then watch them. It is good medicine, but it can be hard to swallow, so pick your time.
As far as singing technique is concerned, I would just keep expanding your horizons.
@Renaissance-Man is having you look at Cat Stevens. That is a good suggestion. CS has a baritone voice that can really rumble with grit when he starts or finishes a line. You could do something similar too, to help finish a line powerfully (as per the discussion with
@SweetWaterBlue.)
In a totally different direction, listen to your middle video, (No Sound but the Wind) and then go listen to some Roy Orbison. I can hear some of his high vocal embellishments being worked into a song like this. It would let you stay in that rich redolent register that seems natural to you and let you ornament that with some higher vocal effects to make your audience swoon.
Also the Eddie Vedder angle is a good avenue for you to explore if you want to go into some more rock vocal styles. That is what I am hearing at least. You have a solid basis, now you just push out in several different stylistic directions that are of interest to you and keep evolving your style and technique. It is a process that is never ending.
Good Luck!
-Yukio