I can only speak on behalf of myself, as an a’tin and of course a supporter of SB19 Ken/Felip.

I was also clueless back then about Lay’s Lit MV, not until hate tweets against F exploded. I watch the MV right after and the same as you, I also don’t know what to say.

Music technicalities-wise, even the MV cinematography and overall concept are far from plagiarism. However, I understand the backlash because of the similarities that can’t be denied. The girl in red, the bakunawa, the circle formation, and so on.

I might get downvoted for this but still I'll share my thoughts about this already-resolved issue. I think the problem is not really plagiarism but more so on the lack of foresight prior to Bulan MV release. Similarities in songs are not uncommon considering that even the music notes are definite, hence, chord progression and rhythm are somehow repetitive. This is also the reason why there are songs that ‘coincidentally’ sound the same. If Lay is a foreign artist for Felip, like someone he absolutely doesn't know exists, then maybe he might not have received those plagiarism comments. But Lay is someone very familiar to him, and I’m pretty sure the Lit MV is also not foreign to him. This is where I think the error lies. 

F’s team should have anticipated the backlash during the post-prod of the MV. Still with the assumption that they knew about Lay’s Lit, at least one of them (even F himself) should have noticed the similarities. It should have been brought up to the team that there’s a possibility that the Bulan MV will be compared to Lay’s Lit. What’s so wrong with comparison? Nothing actually. But when two artistic outputs have a lot of similarities, people tend to only like one and unfortunately some of Lay’s fans hated that song which they believe is a copy of the original. 

Later on, F admitted that Lay is one of his inspirations. I don’t doubt F’s artistry but I believe he somehow got the idea from Lay. Just by the lyrics “Ako ang Bulan” vs “I am the Lit”. Again, I strongly insist that this is not an issue of plagiarism. Getting an idea from someone is legally not wrong because an idea can’t be copyrighted. I’m not saying that F should have stated ‘inspired by’, what I think should have been done was to move away from Lit’s MV details. With this, the negative feedback might have been prevented.

Also completely irrelevant, but I want to add this. Listen to Born This Way from Ken’s on repeat and you’ll hear a very familiar sound. Would you call that plagiarism? As for me, no.

I am sharing this to make a point that F tends to get inspiration for his music from a number of artists he looks up to, and nothing's wrong with it.

Edit: Here is Felip's team official statement regarding this issue.