I listened to some of the first video. It is important to consider what took place first. If some forms of new ageism existed before Anton Lavey came along, they didn't become completely negative simply because Anton used them.

Perhaps it would be more accurate to say that a Satan-like being would use anything he could to his advantage. I say "Satan-like being" because if one considers the Bible and its history closely, one will see that it doesn't provide a clear and consistent explanation of what "Satan" means. The literal translation is "adversary." The word is used in various ways within the Bible. On some occasions it means a being who worked on God's behalf.

I do believe there are dark beings out there and there could be some head honchos, but "Satan" is a human word, and such dark beings probably existed before people came up with the word Satan.

If a person uses the word Satan in the way fundamentalist Christians use it, I figure such a person hasn't done a thorough investigation of the way in which negative entities exist.  They instead share a dogmatic and inaccurate viewpoint of what negative beings are. Perhaps one of the ways in which negative beings try to mislead, is by providing people with false concepts of who they are. They try to get people to be afraid of things such as making contact with the beings of love and light that do exist.