I got a to the 5-1/2 minute mark of the video and had to stop listening to the young fellow holding forth on God's word for a bit. He had so many errors in his thinking and handling of Scripture that it was making me cringe and wince. Yikes.
If sinful thoughts should never come to a Christian's mind, what, then, of Paul's words to believers in 2 Corinthians 10?
2 Corinthians 10:3-5
3 For though we walk in the flesh, we do not war according to the flesh,
4 for the weapons of our warfare are not of the flesh, but divinely powerful for the destruction of fortresses.
5 We are destroying speculations and every lofty thing raised up against the knowledge of God, and we are taking every thought captive to the obedience of Christ,
If sinful thoughts should never enter a believer's mind, why does Paul command believers to take every thought captive? Paul also instructs the Philippians Christians concerning their thought-life this way:
Philippians 4:6-8
6 Be anxious for nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.
7 And the peace of God, which surpasses all comprehension, will guard your hearts and your minds in Christ Jesus.
8 Finally, brethren, whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things.
Why would Paul have to tell Christians to be "anxious for nothing" if no sinful thought ever enters their mind? Why would the peace of God need to "guard the hearts and minds" of the Christians at Philippi if their hearts and minds were without a single wayward, unholy thought? Why would Paul have to tell these same Christians what to think about if their thinking was completely ordered and controlled by God? Obviously, it is not the case that Christians never have thoughts that are wrong. Every temptation a person faces, they face first in their thinking and so, if such thinking is not possible for a Christian, why are there so many commands in Scripture to born-again Christians to resist temptation, to forsake the lure of the World, the Flesh and the devil?
James 1:12-14
12 Blessed is the man who endures temptation: for when he is tried, he shall receive the crown of life, which the Lord has promised to them who love him.
13 Let no man say when he is tempted, "I am tempted of God": for God cannot be tempted with evil, neither tempts he any man:
14 But every man is tempted, when he is drawn away of his own lust, and enticed.
Romans 6:12-13
12 Therefore do not let sin reign in your mortal body so that you obey its lusts,
13 and do not go on presenting the members of your body to sin as instruments of unrighteousness; but present yourselves to God as those alive from the dead, and your members as instruments of righteousness to God.
Matthew 26:41
41 "Keep watching and praying that you may not enter into temptation; the spirit is willing, but the flesh is weak."
Romans 7:14-25
14 For we know that the Law is spiritual, but I am of flesh, sold into bondage to sin.
15 For what I am doing, I do not understand; for I am not practicing what I would like to do, but I am doing the very thing I hate.
16 But if I do the very thing I do not want to do, I agree with the Law, confessing that the Law is good.
17 So now, no longer am I the one doing it, but sin which dwells in me.
18 For I know that nothing good dwells in me, that is, in my flesh; for the willing is present in me, but the doing of the good is not.
19 For the good that I want, I do not do, but I practice the very evil that I do not want.
20 But if I am doing the very thing I do not want, I am no longer the one doing it, but sin which dwells in me.
21 I find then the principle that evil is present in me, the one who wants to do good.
22 For I joyfully concur with the law of God in the inner man,
23 but I see a different law in the members of my body, waging war against the law of my mind and making me a prisoner of the law of sin which is in my members.
24 Wretched man that I am! Who will set me free from the body of this death?
25 Thanks be to God through Jesus Christ our Lord! So then, on the one hand I myself with my mind am serving the law of God, but on the other, with my flesh the law of sin.
And so on.
The young man in the video is, I strongly suspect, a Seventh-Day Adventist, which is a cult that, among other things, denies the deity of Christ. According to SDA folk, Jesus is the first among created beings, but not co-equal with God the Father. This is exactly what the young fellow in the video asserted. In light of this denial of the deity of Christ, you ought to dismiss everything else he has to say about Christian doctrine which he badly contorts in several places, as you'd expect from a member of a cult.