It doesnt seem to work properly on the webcam, and theres some lag

I have to accept access to camera AND remember this to make this work. "Only this time does not work"

Is it normal that it doesnt detect my mouth when i speak ? the sound of my voice creates random patterns. it works well for other sounds tho

Just tried it. Created almost totally random patterns on the screen in a silent room.

Many webcam mics have auto-gain enabled, so having it on in a silent room will cause it to crank the gain to the point that the noise floor becomes audible (or in this case, visible). You might want to try recording a sound clip to see if the same effect occurs (i.e. you can hear the static fade out when louder sounds like speech hit the sensor after a period of auto-compensated silence)

It’s either not working or the work flow is confusing and I messed something up, at least write some context to understand what is it and how to connect both. Also, it does max the cpu just opening that link.