The title says Advanced Long Reverse Pendulum Topspin. I'll take my words back for the short and underspin. Sorry.
Since your goal is deception, I'll let it slide. Also, you should only serve that down the line, since you plan on using misdirection.
But I'll just point out that if I was someone who wanted to learn how to do a reverse pendulum serve, your video titled "Advanced Long Reverse Pendulum Topspin" would not be what would I have in mind. When I saw this thread, I was expecting a serve like Zhang Ji Ke's, or Fan Zheng Dong's.
As for how much deception you have, it's decent, but not enough to fool someone with experience.
One more thing to note, since you are prioritizing speed over spin, a more advanced player will simply try to loop. If there isn't enough spin variation, it won't make a difference to the opponent. A loop will simply override the small change you made.
What I will do is serve reverse fast long down the line with some underspin. Since I'm left handed, this goes straight to the righty's backhand. They often go to the net a few times before they catch on.
Another option is to learn how to serve both short. That takes a lot of practice though, and even more so if you want both to be deceptive.