Hi
We need more details.
How are you playing Youtube?...eg what web browser, what media player?
2) What is your main sound output to?
BT speakers or BT headphones
laptop speakers or laptop headphone socket
line out to some speakers for analog sound
hdmi out to some monitor or speaker system
some other audio out...eg optical
3) leaping ahead....if pulseaudio is playing up and you use a web brower
use
Code:
apulse <browser-exe-name>
Naturally you would need to install apulse if your distro does not have it pre-installed (likely)
but you may need to change the audio device.
If interested, I would need to see your
AND you still need to say what your sound device needs to be please