Video #1
Charles Taze Russell, although among the founders of the Watch Tower Bible and Tract Society, never believed in a "visible organization" of God on earth, as do the Jehovah's Witnesses. The Jehovah's Witnesses' organization was formed after Russell died.
http://ctr.reslight.net/2010/01/11/true-church-searches.html
Nothing wrong with Russell's statements concerning the Great Pyramid; what is the point?
Yes, there is good evidence that the angels who sinned (2 Peter 2:4,5) before the flood became the gods of Egyptian and Grecian mythology.
Russell is correct in that ancient Egyptian Abydos tablet does trace back to Adam, thus verifying the Biblical account; so what is the point?
http://www.dawnbible.com/2000/0010-hl.htm
Nevertheless, as Russell also pointed out:
Isaiah 19:14 Yahweh has mixed a spirit of perverseness in the midst of her; and they have caused Egypt to go astray in every work of it, as a drunken man staggers in his vomit.-- World English.
Egypt, like many other ancient nations, although having a root to God's promise of Genesis 3:15, perverted that promise to idolatrous purposes.
Except that one believe that the Bible itself is quackery, I see nothing in the first video that would indicate that Russell was presenting anything that could be considered quackery.