I'm asking "with such demands do you give back as well by recording and publishing talks people give to you?"
About 90% of speakers at big events are there to promote their product, or to get their company's name out there for recruitment purposes, or to promote their consultancy, or to build their personal brand. If you don't give a shit about any of that stuff, maybe you don't need to bother?
But there are some conferences that ask and respect your preference whether you'd like the video recording to have your face or just the audio. But I have yet to see a conference that go as far as asking the audience to not take photos of the presenter, so it's pretty much moot if you do not want your photos published at all.
This is just my personal opinion, but your expertise in your proposed topic would have to be really good (i.e. you've written a few blog posts about it) for a conference to overlook this.
Recorded videos act as a portfolio for both potential speakers and conferences alike. I think some first-time attendees rely on past videos to determine whether a conference is worth going for.
(That said, we've set videos as unlisted for people who think that they've bombed their talks before — think leaving the stage in tears because the Q&A was harsh — but that's just goodwill.)
But conference presentations are basically public events and if that bothers you, you should probably reconsider doing one. (Yes, per parent, if there's a real disaster--and those happen--they may be deep-sixed but I wouldn't count on it.)
For most conferences that do blind-rating first, only in subsequent rounds when the programme is being put together.
Certainly when I've been on conference committees we tended to know a lot of the presenters and wouldn't have wanted to just rely on submissions. We knew who were experts on specific topics or were just good presenters.
Most of the time, the organizers are squeezed to find a speaker, so you are pretty much guaranteed to be offered a slot if you just ask the host.
Speak at your local meetup, and record yourself doing so if the meetup doesn't record the talks!
Meetups often have trouble finding speakers (well, many of the non-AI ones here do), so it's a win-win for both the meetup organisers and the budding conference speaker.
Another way to get your name out there is to speak at free (/low-cost), multi-track conferences like FOSDEM. Free conferences tend to be more receptive of first-time speakers because attendees didn't pay hundreds of dollars for their tickets.
(If you are an up-and-coming speaker, please don't let my comment discourage you from submitting their proposals to larger conferences. Some conferences have the resources and willing alumni to run speaker mentorship programs.)
Some people are much more privacy-conscious than others and thus at least don't want more videos of themselves online than what is absolutely necessary.
This, very much this.
I run a paid, one-day, mid-sized conference every year, and with only so many slots, we find it very, very difficult to risk choosing people who don't have videos of themselves speaking.
A short meetup talk or a lightning talk at a different conference could make all the difference towards being selected, because we need to know that you're vaguely capable of conveying what you want to share to the audience.