There are great signs. There have been great signs throughout church history. A good word to remember concerning signs throughout history is 'recapitulation'.
Sling and Stone presents some good videos. I see he has a large following and his video view count rises quickly. If Sling and Stone leads people to Christ, I'm all for him. But, I literally read Revelation symbolically.
The early 1st century church saw some of the same signs. They thought the Second Coming was going to happen in their lifetimes.
The movement to think like Sling and Stone, restarted in the American Church in the 1830's.
Remember - God wins.
Some references I find valuable in our discussion -
1. The Returning King, A Guide to the Book of Revelation. By Vern S. Poythress 2. The Book of Revelation, NIGTC. By G.K.Beale 3. The Temple and the Church's Mission. By G.K.Beale