Josf3
I have done that many times before, and always recovered in a few days. Those are tiny speakers run off low voltage like 5 Volts, not enough power to do any real damage. Believe me I know, I used to be in the business of computer repair for over 25 years. In the future it's a good idea to just turn the volume down to 0 after watching a youtube that way the next time that you listen to a youtube you will need to bring up the volume slow until it gets to a reasonable level. And then just repeat that procedure, try and get into the habit of doing it. Some youtubes are recorded louder then others, this is the best way to avoid the problem in the future.
Good Luck
Louie
Quietatnight