Oh My! it looks like a tunnel, a cloud tunnel. Ang ganda naman po it is really uncommon to see this kind of cloud formation. I am happy that you were able to get a photo and a video as well so you can share it with us Tita.
You were meant to see this cloud because you were at the right place at the right time. I guess, You have attracted the clouds since you are one of the avid cloud Hunters!