A recap is a few hundred words. A transcript is several thousand, all of it your church's own language, all of it readable by a search engine. Of everything you can put on a sermon page, it does the most work.
What it changes
People do not search the way sermons are titled. They search a phrase, a question, half a verse remembered wrong. A transcript is the only thing on the page likely to contain the actual words somebody types.
It also makes the sermon usable. Somebody can skim it in four minutes instead of watching for fifty, find the part they were after, and read that bit properly.
The accessibility point, which is not a footnote
People who are deaf or hard of hearing, people whose first language is not English, and people who simply read faster than they listen all get the sermon instead of not getting it. That is a reason on its own, before any of the search argument.
The real reason to turn one off
Not typos. A transcript will mishear a name and it does not matter much, and you can fix it.
The reason is that some of what gets said from a stage was said to a room. A name in a prayer. Somebody's diagnosis. A testimony that was meant for the two hundred people in the building. All of that is fine in the room and permanent on a page a search engine reads.
So the question to ask before publishing is not is it accurate. It is: was anything said here that somebody would not want found by name in five years?
That is a per-message question, not a site-wide policy. Turning transcripts off across the board because of four sermons throws away the benefit on all the rest.
Doing one yourself
Automatic captions are not a transcript. They have no punctuation, no paragraphs and no speaker changes, and pasting them onto a page produces something nobody will read. A transcript needs sentences.
- Start from the audio, not the auto-captions. Any transcription tool will do a better job than the caption track
- Break it into paragraphs, roughly where the preacher changed direction
- Fix every name. Transcription hears a name it has never met and guesses, and names are what people notice
- Write the passages out properly rather than leaving "verse 4"
- Read the whole thing once before it goes up
That last step is the one that matters and the one that gets skipped. It is also where you catch the thing that was said to the room.