"10 years to 'get good'!" - that one always make me laugh! :O)
I cannot find any applications on youtube that I feel remotely do the sequence any justice whatsoever.
Just some general ideas from the posture, firstly if you break away from the form (if you've got a good instructor showing you the correct mechanics) you'll loose all of the subtle but funky power from the form. The arms should not divert a millimeter from the way the are used in form, and in the form they are powered from the feet through the waist.
A couple of ideas though. Firstly a lovely chin na idea with the 'crane beak' hand which has a lovely version of the 'nikkio' wrist lock. Have a partner grab your wrist as if you were practicing nikkio but instead of grabbing with thumb make sure that your entire hooking hand ends up in the inside of their wrist - you'll get a lovely roll of their entire arm. Now you can either clamp their hand down using your free one and turn this into a lock/break or you can capitalize on them loosing their grip and freeing your hand up to drive the fist straight into the throat or perhaps follow through on this into a neck tie... and a throw by latching onto their arm with the other hand... which makes sense when you think it starts in peng (could be latching on) and finishes in aun. Powered from the body this is lovely! In the Yang Long Boxing there is an open handed variation instead of the crane beak and this turns the striking possibilities to the fingers into the eyes and throat or using the tigers mouth. Again all without deviating from the form once.
The step in the form has some fantastic skills hidden in it too. There are leg trapping skills and it is a wonderful early lesson for the student in using stepping to generate power. The striking applications and locking applications mentioned above can be turbo charged by using this step properly.
Then there's what's going on with the other hand and there are some wonderful push hands drills that can be found here. The subtle methods of opening up the centre line there are awesome. From a karate point of view, if you've worked any kakie drills from the outer block you'll see how this can be used to open the body up and strike through. This concept is taken to a different level in the snake creeps down/squatted single whip variation - and in the yang cheng fu long form the applications when snake creeps down flows into 'punch up to seven stars' and 'golden cockerel stands on one leg' again brings a warm glow to my cockles!
You may have noticed I rather like single whip! Thing to remember is that there are no fixed applications in tai chi, unlike much karate bunkai, only possibilities based upon a core set of principles. The application depends on the circumstances and must always fit the 'environment' and will never be the same twice. What the opponent does dictates everything, where their weight is, the angle of the attack, which arm, how aware you are, etc, etc. Just remember tai chi form applications are only possibilities that appear!