Yes it is a nuisance.
There are two hiphens The normal one \u2D, and the funny one. The funny one is used sometimes within youtube comments. \u00AD and comes up as hidden.
Paste into notepad(to remove formatting) and also, notepad shows it, and then into MS Word(or just in Ms Word do paste special..unformatted unicode), put your cursor to the right of the hiphen, or any character, and press ALT-x and you see the ASCII or unicode code for it.
This may seem strange. Be aware that there are a few characters with two different types. A type you use usually which is within the 0-7F range, and a type people tend to not use much or at all, which is >7F. The two types of spaces(a normal one and another called the non-breaking space, ascii code 160 \uA0 which can be of use). There two types of pipes 7C and A6 The A6 one is just asking for problems as it causes failures on the command line. And two types of hiphens, the second one you see, behaves funny too, as youtube comments sometimes use it and hide it and don't display it as a hiphen.
Another funny character I see which is used by youtube in comments is \uFEFF
You can run notepad2(download it), choose file..encoding..UTF-8 then paste the text in, and search for \uFEFF replacing with nothing, (check the box that says transform backslashes).
Similarly you can open notepad2, search for \u00AD (that funny hiphen) and replace it with a regular hiphen. Editpad free might be able to do it, though I use the pro version for its regex support.
I'd note that charmap doesn't copy the funny hiphen correctly. (So if you want to experiment and you choose copy and paste it into a piece of software and it displays funny, blame charmap), but it copies fine(as in with the character) from your link in my browser(chrome). Better if the character wasn't there though, it is a nuisance! But you can see the ascii code of it in Ms Word, and you can search and remove it in notepad2
You see from charmap it(\u00AD) is called the "soft Hiphen" (i'm just glad they didn't hiphenate that title!)
In the pic I used Ms Word and did ALT-x
Best Answer
It's stacked diacritics on top of one another, as seen here, and in the infamous zalgo text; in this case stacked accents used in many non-English Latin-based languages.
Specifically, it seems to be a tilde, used as an accent.
Credit where credit is due, it uses the same techniques used for the faces in this question.