I was wondering if anyone could inform me of or give me the link to a
Video of how to make a mob grinder. ( like game's)
^This is a pretty good tut, however because of the 16 block minimum range a player must be in for the spawners to work, I suggest placing the spawning room down by the area where you stand, then using a water elevator (alternating water blocks and signs) to let the mobs travel to the top of the chute.
I second football's suggestion; Xisuma is a pretty good tut maker. Additionally I suggest you check out Etho's Lab on Youtube for some other designs, specifically for cave spider traps.