Can participants turn on their camera by themselves after turned off by the host?

@ZP_ZX  As far as I know, due to security and privacy, the host will not be able to turn on the participants' cameras remotely.

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Hi, @ZP_ZX – 

Also see this Zoom Community post. I think your question is more about participants not being sble to turn their own video back on, once the host had Stopped Video for an attendee. It’s also a security feature. I believe if you use the Ask User to Start Video menu, the user can start video immediately OR they can respond No to the prompt inviting them to start video, but their ability to start later is restored. I haven’t tested that lately, but I’m pretty sure that works.