You pose a very good question, OP! We've shared videos of our DD's gymnastics progress over the years on Youtube. I don't use her name, but do use age and level. We don't share her gym name or our location. As with anything, someone could try to figure out where she's from and name. I hope they wouldn't, but they could. She is an "amazing Suzie" to us, but may not be to others.
We certainly didn't know how she'd progress when we started sharing a few years ago, but she's progressed nicely. It's been fun, actually. We don't have a ton of followers, so it's rather low key as of now. We haven't had trouble with comments, since I don't allow them without my approval. If I see anything that seems a little odd or rude, I just don't allow it to be posted, and there's only been a handful of those. My DD loves to share her talents on Youtube and so far it's been a positive experience. I also enjoy seeing the other "amazing Suzie's", but do feel badly for them as well, when they suddenly seem to fall of the radar and wonder why. It's honestly none of my business, but I do wish them well. I am not a CGM who thinks her daughter is the most wonderfully amazing child in the universe and can't stop talking about her and driving all of the other gym parents up the wall, lol. At least I hope I am not!!
I know there's plenty out there who are better and will go further than her. For now, we just enjoy the ride. If my dd gets to a point where she doesn't feel comfortable with me sharing on Youtube anymore, then I most certainly would stop at her request. If we came across issues with others online, we'd stop. I really have to say, it's been a positive all around up till this point.
Also, I have to add, I've seen plenty of what some may call "average" gymnasts on youtube. Just search the word "gymnastics" and you'll find a whole mix of all sorts of videos, including many that others have shared of their 14 year old level 4 or 5, just having fun being in the sport. I don't think that youtube is only a place for others to share their "amazing Suzies".