Well, I don’t really like the sound of nylon strings. That rubber-bandy sound. I’ve resisted getting a classical or whatever guitar with nylon strings for this reason. Metal strings are just such a brighter and happier sound for me. Also reentrant tuning makes me itch a bit, though I suppose I could get used to it. Though I’m sure I’d never be good on theorbo.* 
You know, I love how your posts send me dashing to google:
For Warr guitar, I know about the Chapman Stick ever since I saw Tony Levin use one in like 1980. I guess this is similarish. I actually ran into Chapman player Robert Culbertson at a street fair years ago; he was happy to talk all things Stick as long as you liked. Super nice guy.
I actually know about bodhrán because I saw it first watching Titanic and a guy I worked with had one but had no idea how to play it.
Karnatak - wow, very cool genre. I googled up this video up. The rightmost woman on the (3 string?) fiddle sounds amazing, also the percussion. Hell, the singing is amazing. Very fun. I can’t tell where the drone sound is coming from, something offscreen? You hear it even when the fiddle is silent.
That’s a new bug in Discourse which is discussed in a Site Feedback thread here. Dr Strangelove found a workaround: either paste video link in last and click Post immediately, or compose your whole post in a text editor, paste it and post. You’ll be unable to edit your post after that and will get the error message you saw.
(and now I’ll be unable to edit this post so hopefully I didn’t mess up)