Guess I was using a wrong setting in Anibuilder yeah. However something is still off.

At least it shows up now, just not properly. No difference between a colored .ani or a greyscaled one. Speaking of which, is there a way to make the persona's appear without that green(or whatever the color the player has his/her hud set to) filter over it?
About the events: you're not using several important SEXPs intended to boost the cutscene effect (you can find them in the Cutscene section of the SEXP list, among the others like fade in/out and set-camera-position).
Well the cutscene itself isn't exactly done yet but i'm slightely confused on which important SEXPs I might be missing.
About the message, I suggest to remove is-goal-incomplete. Use "is-destroyed delay 0 UEU Explorer" instead as condition. Although SEXPs whose names end with "-incomplete" should work if paired with SEXPs of other kinds, I suggest to remove it from the event.
Well it worked before (that is, before I inserted the cutscene related SEXPs). The is-goal-incomplete is just there to have the directive text go red and to get the primary objective failed mesage. Removing it doesn't solve my problem unfortunately (yeah I tried).
I also suggest to take a look at the hud-disable and hud-disable-except-messages SEXPs (from the Hud list), they can be useful in cutscenes.
I did and then removed them again since in this particular cutscene they don't really do much


timings of the chained SEXPs is all set to 0.