Maybe it´s of no importance, but have you noticed in the 4th clip, with Holloway and David, how David holds his right hand forefinger all the time, while he´s fiddling with the drink he´s about to offer to Holloway?
Isn´t that the same finger with the drop of black goo, in the close-up scene with the "Big things have small beginnings" phrase?
I think Holloway is about to enjoy a long drink with a special ingredient ...
Dió!