Since he did not signal, KCI protection ends when the ball is muffed or touched by the Team B player. 6-4-1-b.
Here's a play some of us probably remember.
https://www.youtube.com/watch?v=OfQ7bl2nvP8Let's imagine that the interfering player(s?) are instead approaching a yard or two off to the side of B25 at 3 o'clock and 9 o'clock and do not interfere with his path towards the ball. B25 gains control over the ball, is hit with identical timing, and muffs it. Is that KCI?
If not, it seems entirely bizarre that in the clip as shown a player can complete a catch
and be entitled to a kick catch interference call for opponents violating the no-go zone; but in a very very slightly different situation, he literally is interfered with by an opponent before completing the catch, interference which causes him to muff it, but that somehow isn't a kick catch interference foul.