Dearest [Laugh & Peace MIX] and
poker face [Spiritual Guidance Mix] PV are not official! They were fan made
That is actually the original poker face PV replaced with the remix.
As for M above & Beyond it truly is official. The other Remix PV is Kanariya Jonathan Peter's Mix, Fly high HAL's mix 2000 and Dearest Acoustic orchestra Version.
The Endless Sorrow you listened to in the PV is the original single version. However the one in the single doesn't have the guy saying "give me freedom, give me hope", it was just added in the PV. The album version of Endless sorrow is actually a remix (Gone with the wind).