Interesting thoughts and comments. There are right answers out there, and there are many many ways to do it. Many of the big names on YouTube are doing it very differently, not how I would have ever wanted to make a video, but what they are showing is this isn't TV made by anyone and everyone, it's an interaction medium in the same guise as social media and it can be anything you want it to be. The sheer amount of content uploaded every minute means we don't have to worry about liking one style or another, as look down the lists and there will many style you do like.
I accidentally started a channel when I accidentally went viral on social media lat last year. I made a video simply to answer some questions and explain a situation, and that too went a bit crazy, so I thought I'd stick at it and just do more for fun and to help others. It nothing anyone here would want to see, and after the initial hit my videos don't get any views at all now, but they are still fun to make and I now have a film project planned with a production company and they have agreed I can film the filming (as long as it doesn't spoil the final result) and they are going to help me to learn all I need as we go along. It's a long term project so I should get plenty of practice - I need it!
My point is I don't see why anyone would want to watch any of my videos, but they do, and they watch through a fair chunk on average. I'm slowly adding extras, I'm making more appropriate title cards and I now have a channel logo, a proper channel URL, I'm adding closed captions and considering translations and I'm slowly making better quality videos I think. Is my style right? Hell no, not at all, but it's the only one I'm going to use, take it or leave it type of thing. If I had to make my living out of it I may think again, e channel is monetised and over time it may grow into something I can make a little loose change a week, who knows, but I don't care and I'm not doing it for that. I have a desire to educate and inform through it, maybe that means my style and performance doesn't matter so much. Not sure.
My videos look rushed, but apart from one I made feeling very ill over Christmas they all take many hours of prep and editing. I've just got a Zoom H5 and have some mics on order so my sound will improve, I have new cameras coming soon and lighting so I can't start going out to do proper interviews and do the things I really want. I'll never put on a suit and tie, I'll never change the way I speak, I always put in as much effort as possible within my limitations (I'm a full time carer to 3 so I don't have much free time to do stuff I enjoy). I look scruffy, it's my look, but looking like this I ran a charity, ive chaired big meetings with politicians and many other people, I've presented to crowds of many hundred, appeared on several national and international TV channels and news items (some live some recorded) and in photographs in hundreds of papers. I have done nearly 200 radio interviews (mostly live some recorded) and never tried to speak differently or script anything.
My point is nobody (yet) has turned me away because of how I look or present, if anything they keep on coming, I've got several other things bubbling and it seems stuff I'm excited about and didn't think I'd get. Nobody has said I need to dress up, have a shave, brush my hair (I haven't brushed my hair ever, I shower, it dries, it's done) and yep it's messy, but it's me. I don't mess it up for TV! I don't think of making a video and put on scruffy clothes and mess my hair up and quickly grow a beard. I have had to wear makeup on TV of course but that's it, other than that they take me as they find me.
Of course as most of this stuff was news stuff it's different, but the calls for other involvement are not, they like what I say, how I say it, how I come across. Do they like how I look? Tough, this is how I look.
If you have a way and it's who you are stick to it. Don't be yet another YouTuber following the pack, and don't try to be an average presenter looking like a twerp stuck in a field for a news piece. Wear what you wear, act how you act. The vast majority won't like what you are talking about, those that do may not like you, your to camera style, what you've got to say or how you see it, they are not your audience. The rest, well, they are I guess. If you want to make a huge successful channel you need more than a bit of luck, changing the way you act in front of the camera will help some to stick around but unless you want to do that for every video and change more on top of that it's not going to be enjoyable. Chances are you will get bored of it before you make a success of it - that's just how it is, most won't stick at it, I probably won't - but success is your own measure, not mine or anyone else's.
For me it's about the enjoyment. If the only way I could continue was to change who I am I wouldn't want to do it anymore. Good luck for all those giving it a go - I think it's fun!