Complex sentence: Yuya proceeds to travel other dimensions and defeat the other Lancers with Riley watching the footage, Yuya finding Zuzu and her counterparts still inside the remains of Arc-V in an inactive state.
Split into simpler sentences: Yuya proceeds to travel other dimensions and defeat the other Lancers with Riley watching the footage. On his way, Yuya finds Zuzu and her counterparts still inside the remains of Arc-V in an inactive state.