This video reflects on the answer given by bro Eli Soriano to the above question. His video can be found here
The three points that were emphasized in his video are that...
We can however also establish that the doctrine that Christ handed down to the apostles was also handed down to all those who believe and are saved.
Acts 2:46 And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,
2:47 Praising God, and having favour with all the people. And the Lord added to the church daily such as should be saved.
This should therefore mean that everyone that is saved becomes an addition to the true Church originally established by the Lord Jesus Christ.