Brigham Young changed the organization of the church and who was in charge.
King Brigham

Very good series about the Priesthood by Measuring Doctrine. It brings out how there is one priesthood using scriptures and many appendages. It also brings out how the LDS / Brighamite church has changed church structure and how in Joseph Smith’s day priesthood was only given to adults and not teenage boys.
Cracking the Priesthood Paradox 1 2 3 4 5

Near the end of the video Real Intent & Full Purpose of Heart Mark Curtis shared a quote from Brigham Young admitting that he was “NEVER ORDAINED HIGH PRIEST”. He also brings out that in D&C (LDS 107) (RLDS 104) (1835 3) (1844 3) YHWH through Joseph Smith reveals to us that you need this ordination to lead the church. If you are interested at the bottom of MUCH vs ALL in LDS D&C 132:40 I bring out quotes and scriptures how the traveling twelve should have nothing to do with church government and are only to preach the gospel to those outside the church.

Now will it cause some of you to marvel that I was not ordained a High Priest before I was ordained an Apostle? Brother Kimball and myself were NEVER ORDAINED HIGH PRIESTS. How wonderful! … When a man is ordained to be an Apostle, his Priesthood is without beginning of days, or end of life, LIKE the Priesthood of Melchizedek.
Brigham Young, 1853 Apr 06, Journal of Discourses 1:136

D&C (LDS 107:9,22,65-66,78-79,91) (RLDS 104) (1835 3) (1844 3)
9 The Presidency of the High Priesthood, after the order of Melchizedek, have a right to officiate in all the offices in the church.
22 Of the Melchizedek Priesthood, three Presiding High Priests, chosen by the body, appointed and ordained to that office, and upheld by the confidence, faith, and prayer of the church, form a quorum of the Presidency of the Church.
65 Wherefore, it must needs be that one be appointed of the High Priesthood to preside over the priesthood, and he shall be called President of the High Priesthood of the Church; 66 Or, in other words, the Presiding High Priest over the High Priesthood of the Church.
78 Again, verily, I say unto you, the most important business of the church, and the most difficult cases of the church, inasmuch as there is not satisfaction upon the decision of the bishop or judges, it shall be handed over and carried up unto the council of the church, before the Presidency of the High Priesthood. 79 And the Presidency of the council of the High Priesthood shall have power to call other high priests, even twelve, to assist as counselors; and thus the Presidency of the High Priesthood and its counselors shall have power to decide upon testimony according to the laws of the church.
91 And again, the duty of the President of the office of the High Priesthood is to preside over the whole church, and to be like unto Moses—

Brigham Young also contradicts D&C (LDS 121:37) where it teaches if a man seeks “to cover their sins, or to gratify our pride, our vain ambition, or to exercise control or dominion or compulsion upon the souls of the children of men, in any degree of unrighteousness” in the last sentence of the quote above “when a man is ordained to be an Apostle, his Priesthood is without beginning of days, or end of life”. Brigham Young here is claiming you can’t lose the priesthood you are given but D&C (LDS 121:37) states that you can. To be honest I wonder what Brigham Young taught about Judas Iscariot who betrayed Yeshua the promised Messiah for money, in that they both were apostles.

D&C (LDS 121:37) That they may be conferred upon us, it is true; but when we undertake to cover our sins, or to gratify our pride, our vain ambition, or to exercise control or dominion or compulsion upon the souls of the children of men, in any degree of unrighteousness, behold, the heavens withdraw themselves; the Spirit of the Lord is grieved; and when it is withdrawn, AMEN [meaning they no longer have it] to the priesthood or the authority of that man.

Mosiah (LDS 15:13) (RLDS 8:46-47) Yea, and are not the prophets, every one that has opened his mouth to prophesy, THAT HAS NOT FALLEN INTO TRANSGRESSION, I mean all the holy prophets ever since the world began? I say unto you that they are his seed.

Melchizedek Priesthood is given by YHWH’s own voice not by the laying on of hands

All the prophets had the Melchizedek Priesthood and were ordained by God himself. - Joseph Smith, Teachings of the Prophet Joseph Smith, page 180

3 Nephi 11:21 And the Lord SAID unto him: I give unto you power that ye shall baptize this people when I am again ascended into heaven.

3 Nephi 11:22 And again the Lord called others, and SAID unto them likewise; and he gave unto them power to baptize. And he SAID unto them: On this wise shall ye baptize; and there shall be no disputations among you.

Alma (LDS 8:4) (RLDS 6:5) And he began to teach the people in the land of Melek according to the holy order of God, by which he had been called [voice]; and he began to teach the people throughout all the land of Melek.

D&C (LDS 84:42) (RDLS 83) (Kirtland 4) And wo unto all those who come not unto this priesthood which ye have received, which I now confirm upon you who are present this day, BY MINE OWN VOICE OUT OF THE HEAVENS; and even I have given the heavenly hosts and mine angels charge concerning you.

God will not acknowledge that which He has not called, ordained, and chosen. In the beginning God called Adam by His own voice. “And the Lord called unto Adam and said unto him, where art thou? And he said, I heard thy voice in the garden, and I was afraid because I was naked, and hid myself.” (See Genesis 3:9-10.) Adam received commandments and instructions from God: this was the order from the beginning. - Joseph Smith, Teaching of the Prophet Joseph Smith, page 168

JST Genesis 14
26 Now Melchizedek was a man of faith, who wrought righteousness; and when a child he feared God, and stopped the mouths of lions, and quenched the violence of fire. 27 And thus, having been approved of God, he was ordained an high priest after the order of the covenant which God made with Enoch, 28 It being after the order of the Son of God; which order came, NOT BY MAN, nor the will of man; neither by father nor mother; neither by beginning of days nor end of years; but of God; 29 And it was delivered unto men BY THE CALLING OF HIS OWN VOICE, according to his own will, unto as many as believed on his name.

Thus we behold the keys of this Priesthood consisted in obtaining the VOICE of Jehovah that He talked with him [Noah] in a familiar and friendly manner, that He continued to him the keys, the covenants, the power and the glory, with which He blessed Adam. - Joseph Smith, Teachings of the Prophet Joseph Smith, page 171

Moses 6:66-67
66 And he heard a VOICE OUT OF HEAVEN, saying: Thou art baptized with fire, and with the Holy Ghost. This is the record of the Father, and the Son, from henceforth and forever; 67 And THOU ART AFTER THE ORDER OF HIM who was without beginning of days or end of years, from all eternity to all eternity.

Mosiah 23:17 And it came to pass that none received authority to preach or to teach EXCEPT IT WERE BY HIM FROM GOD. Therefore he consecrated all their priests and all their teachers; and none were consecrated except they were just men.