They have completely disrupted the industry and collected lot of followers. They are legit but the way they do business is a scam. Until and unless you pay them way more than the listed price on their official site your package won't move a bit and is going to be held for years. Some private chinese and korean forums have users who posted they paid around 120k to 130k for a 4 inch pack.

The video proof dvd is shipped to buyers during delivery. So it's not that they aren't showing video proof or picture.