See 1 Corinthians 15:3-4, cf. Matthew 26:28, Luke 1:77, Acts 10:43, Ephesians 2:8-9.

There are numerous models and views of the atonement, my aim is not to debate them all here, perhaps in a future video. For now I will say this: Unlimited atonement should not lead us away from the doctrines of sin, grace and sovereignty. Limited atonement should not lead us away from evangelizing the lost (Rom 14.15, 1 Corinthians 8.11, Matthew 28.19, Acts 1.8, Titus 2.11). Christ’s death was of inestimable value and could have saved any number of worlds, the death of Christ is sufficient for all, efficient for those who trust in Christ (scripture’s limited language: Mat 1.21, John 15.13, John 10.11, 15, Ephesians 5.22f, scripture’s unlimited language: John 1.29; 3.16; 2 Corinthians 5.14-15; 1 Tim 4.10; Heb 2.9; 1 John 2.2). Saving faith is offered to all but granted only to the elect. God is the savior of all persons, especially of the faithful. Christ died not a potentially but an actually sacrificial death on the cross, becoming sin and curse as a substitute for others (2 Corinthians 5:20-21).