1st Question to the builder of this.
Do you know your accual AS endgame with HC active with this build?
It's quite odd in 1st you have malady and i laugh at WW's with it :P but on the other hand you have bloodrazor.

We know you have Blood scent run speed but its % based of your accual MS, and going for boots so late will get you in spot when late game begins and you are still at 0 kills and not beeing fed = you will get owned by carry.

ESPECIALY if you do it with this kind of skill build...
omg... last point in HS at lvl 18... you are totaly focusing on endgame where you are quite medicore if not fed early...

Also that jungling movie is like 50 years old, beta times. There are better ones, and you could accualy post something new.

Even that little desc you posted, why 2 pots when you can get 5? you want to run to town 5 times before you get lvl 6? That is what i call an effective jungling XD
If you want to go with 2 pots... get sword instead of cloth armor.

Well... ignite... you either kill something or it runs away, ignite wont change anything waste of summoner spell spot, also masteries on AP and AP during ignite cd, may i ask what for?
The only spell that is accualy benefiting... ekhm big word benefiting... is HS witch is mainly % based. You will nearly always do the % based damage where AP doesnt matter at all (talking about champions ofc not creeps) But anyway you lvl up this skill last XD

How many games did you accualy do with WW?

I agree with WoRd.
I understand why u buy cloth armor first, Armor is very usefull in the jungle, but I think good boots are important to a champ like Warwick as well , I don't play him often, but I think you're around mid-game when u finally buy your boots, I would suggest: Cloth->Madred razors(or bloodrazor)then the boots and then u go for malady and everything else. How would you kill someone if you don't even get in range of the target?

Ok dude, your runes does make sense and corresponds to your items some how, but the fact that you go for malady faster than boots doesn't make sense, You should spend your money going for Bloodrazor first or the boots. If there is a ryze or veigar, or any other mages they will destroy you period. Get wits end or if not mercury trends, belive me it will help you against any mana users. For your summoner spells, don;t use ignite, i don;t understand why Warwick's do it, yeah smite doesn't help you against champs but it helps you control the buffs quicker, and sometimes help you steal baron buffs which does happen alot atually. Forget malady and rush bloodrazor and then either wits or bloodthrister. Infinity edge is Ok, but i would sugest, Frozen mallet or sunfire cape. I usually went for trinity force but the others are telling me not to do it, i mean its a good source of slows, attack, ability, but there probably right. Go for hunters call first if your jungling, its much more effecient. Try to explain yourself more, other than that good build and good luck.

Word-

No offense, but for a jungle Warwick, DEWO's build is the way to go.