Complex sentence: In August 2011, a leaked clip of Silas preparing to attack Theresa was posted on YouTube, which led viewers to believe that Theresa would become his next victim, which was confirmed in the fourth series of "Hollyoaks Later".
Split into simpler sentences: In August 2011, a leaked clip of Silas preparing to attack Theresa was posted on YouTube. It was then confirmed that Thesera would become Silas' next target in the fourth series of "Hollyoaks Later".