I don't want videos of me online. Would an audio recording + slides suffice in your opinion? Or would you doubt it was really live in front of a sufficiently large audience? Idk how common fraud here would be
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?
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.
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.