Just watched this, it's seems pretty conclusive. The story is that the titanic that sank was in fact its identical sister ship the 'Olympic', which has been damaged in a collision and would not have passed inspection as seaworthy without extensive and costly repairs. The titanic and olypmic were owned by the White star line, which was owned by banker JP Morgan.
The result was the hatching of a conspiracy whereby the damaged olympic underwent shoddy repairs and then had its name changed to 'titanic' and sent on the famous voyage to the US where it was deliberately crashed into an iceberg and the insurance money of 12.5 million ultimately claimed. A plan was in place where a 'rescue' ship would come and rescue the passengers, but due to a mistake in the declared position of the 'titanic', the rescue ship was unable to see the flares that were sent up and did not arrive in time.
The conspiracy involved the British govt. at the time and included a clearly whitewashed inquiry, and was an early example of a 'false flag' carried out by banking interests that killed 1,502 people.