Where are the instruction videos? I have not yet found them.
Where did you look? Videos are typically found on Youtube.
Since thalueng’s post there is the new & improved desibilator plugin.
Also good free ToneBoosters DeEssers have since been released …
https://forum.audacityteam.org/t/free-v3-toneboosters-plugins/64538/1 {64-bit PC & Mac}
[ BTW IMO AirWindows DeBess is not worth the effort of download ].