Complex sentence: Video footage also emerged on numerous news outlets, which showed recordings of shots being fired inside the Canadian Parliament, and also footage which allegedly showed Kevin Vickers moments after he shot Zehaf-Bibeau.
Split into simpler sentences: Video footage also emerged on numerous news outlets in which the sound of shots being fired inside the Canadian Parliament could be heard. Also released was footage which allegedly showed Kevin Vickers moments after he shot Zehaf-Bibeau.