Welcome to us.
Watching youtube videos, can be a sure way to much frustration and grief.
Most of them are rigged for clicks and views.
There are a few good ones though from people like Sreetips, Owltech and a few more.
Here are some tips for studying.
We ask our new members to do 3 things.
1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the most important chemistry regarding refining.
It is free here on the forum:
Screen Readable Copy of Hoke's Book
2. Then read the safety section of the forum:
Safety
3. And then read about "Dealing with waste" in the forum:
Dealing with Waste
Suggested reading:
The Library
Forum rules :
https://goldrefiningforum.com/threads/gold-refining-forum-rules.31182/post-327766