Don't use that page as a splicing guide. That splice is completely wrong. The strength of an eye splice comes from the bury of the line inside itself. Not from poking the core though the core a bunch of times. All he did was make a huge stress riser where the diameter of the line suddenly shrunk were the splice ended, and sure enough that's where his splice broke.
It's like tying a dozen overhand knots instead of bowline. An overhand knot is weaker than a bowline. A dozen overhand knots doesn't get any stronger, but it does get stupider.
A proper double braid splice can be seen here: YouTube - splicing double braid
Or in these instructions. http://www.samsonrope.com/site_files...Splice_Rev.pdf