While I do not watch posted videos (no offense) I have studied the Catechism of the Catholic Church (CCC).
The RCC has a total misunderstanding of the meaning and significance of justification by grace through faith followed by sanctification through the power of the Spirit. Furthermore the RCC believes in (a) sacramental salvation, (b) baptismal regeneration, and (c) the necessity of being a Catholic in order to be saved.
But after you have fulfilled all their demands, you can expect to go to Purgatory to pay for your own sins and be purified. So it is a lose-lose situation all the way.
You will also need to study the Canons of the Council of Trent (which are still valid and quoted in the CCC).
Trent was bitterly opposed to the Reformers and their teaching on justification by grace alone through faith alone in Christ and His finished work of redemption. Thus they were bitterly opposed to the Five Solas of the Reformation:
- Sola Fide, by faith alone.
- Sola Scriptura, by Scripture alone.
- Solus Christus, through Christ alone.
- Sola Gratia, by grace alone.
- Soli Deo Gloria, glory to God alone.
"Justification is by grace alone through faith alone because of Christ alone. In justification Christ's righteousness is imputed to us as the only possible satisfaction of God's perfect justice. Our justification does not rest on any merit to be found in us, nor upon the grounds of an infusion of Christ's righteousness in us, nor that an institution claiming to be a church that denies or condemns sola fide can be recognized as a legitimate church." Theopedia