bryan didn't fall. in his replay, he killed one of your worms. you desync'ed during his turn, making it look like he fell. he killed your 9hp worm.
so he has 52hp and 56hp worms left, and you have 7hp worm left, and it's your turn.
it's hard to say that bryan is an easy winner, but it's also hard to say that guuuria will win easily either.
bryan does have the advantage here, but he should not call this his win yet.
I'd say to replay the end game situation if you still want to guuuria. It should not be too hard to recreate.
2 worms for bryan, 1 worm for guuuria (and guuuria will start first). place worms exactly where they were at 18:05. set the worm hp to the highest of bryan's (56hp) and both of you agree that if guuuria takes 7hp damage or more then guuuria dies. and if bryan's 52hp worm takes 52hp damage or more then bryan's worm dies (so, skip turns if that happens to keep gameplay normal --> maybe collect/destroy crate if it's in the way or affects gameplay).