I think it's important that accurate information about the temple be available. The temple ceremony recordings put on YouTube under the account NewNameNoah, though they have been controversial, do provide accurate information.
Going through the temple is like entering a contract (or covenant to use the religious term). An important part of being Mormon is making and keeping sacred contracts (covenants) in the temple.
Having accurate information about what's in the contract is essential before signing any kind of contract. In the case of this temple contract (or temple covenant), the church itself provides very little information about what is in the contract. Temple prep classes give vague lectures on the importance of making and keeping contracts (covenants), temple open houses let people walk through the temple, and members talk about their feelings about the temple, but all this is done without actually explaining anything about the ceremonies themselves or the details of the temple contract.
Having accurate information is key to making good choices. Having access to accurate information is especially important when entering into contracts as life-encompassing as the temple contact. For example, as part of the endowment ceremony, members covenant to give themselves, their time, their talents, and everything that they have been blessed with or will be blessed with to The Church of Jesus Christ of Latter-day Saints. That's a pretty big commitment.
The temple recording I've linked to below offers accurate information about that contact, specifically the endowment ceremony. You can skip 58 minutes to hear about the law of consecration, which is the part where the members promise to give everything they have to the church. It is a recording from an actual temple session at a temple in Arizona. Endowment ceremonies are nearly identical across temples (sometimes the version of the movie is different, and some temples will have live actors instead of a movie).
From the temple script:
From the temple script:
"We are instructed to give unto you the law of consecration as contained in the book of Doctrine and Covenants, in connection with the law of the gospel and the law of sacrifice, which you have already received. It is that you do consecrate yourselves, your time, talents, and everything with which the Lord has blessed you, or with which he may bless you, to the Church of Jesus Christ of Latter-day Saints, for the building up of the kingdom of God on the earth and for the establishment of Zion."
I know some people won't want to watch it, and that's fine. There are other people who will want to watch it, and they have the right to do so. In fact, I think they should do so. Especially Mormons who are thinking of entering into the contract. They deserve all the accurate information they can get before jumping into something so big.
This is the bottom line: if the Mormon church won't provide accurate information about the temple ceremonies, then people on the internet will. And that's a good thing.
These videos provide the accurate information about Mormon temples that the members and institutional leaders have not provided themselves. Having accurate information will help both members and nonmembers make better decisions when it comes to the temple.
This link starts in the middle of a Mormon temple endowment session, at the part of the session that talks about the law of consecration: https://youtu.be/5VrsFEiTpsQ?t=3518
(See the YouTube channel NewNameNoah for more videos from Mormon temples)