Please help stuck on teamwin screen, can't enter into Recovery

I just got my brand new Aluminum Nexus 6P last night, I wanted to test out the new Developer Preview #4 right away, so enrolled in the program and got the OTA update which I took, and rebooted running Android N, looks pretty neat, and nice tweaks, and some new features. But I always like to run Rooted and install custom ROM's, but Root is #1 for me.

Ok so I need a little help, I am following the excellent video by Rootjunky ( thank you ), and got through the unlocked bootloader part easily, and now installed TWRP Recovery easily too, but upon first time booting into TWRP, it's just sitting at the Blue and Gray teamwin screen, and not doing anything else, it's not actually entering into the Recovery, to see the list of options, etc...

I powered the device down, and started up again in Fastboot mode, then chose Recovery, and does the same again, just sits at the blue gray colored teamwin screen, and does nothing.

What happened ?

UPDATE:

I powered the device down / off. Then started up again, it went and booted up, to the fresh clean Android N DP 4. But I am not rooted at all yet, due not being able to fully enter Recovery and flash the SuperSU zip yet.

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