How to blur moving objects in video? With android or ios

[Elazarn]

needing app to blur moving faces or moving objects in video.(only android or ios. not windows)like a blur effect YouTube video editor

 

[Rukbat]

With Android or iOS ... or with a video camera in general. This is basic photography, not "cellphoneography".

If you mean to "block out", so the faces can't be recognized, that's done "post-production". You need a video editor that has that function. They're not free - Filmora9, for example, is $60 minimum for lifetime use. (And it runs in Windows - so you have to copy the video to a Windows PC, edit it, then copy the edited video back to the cellphone if that's where you want it.)

This works with a fixed camera (mounted on a tripod or "fixed" some other way) and with a subject that's not moving around too much. If the subject is moving all over the place it's a lot of work to chop the video into may parts, blur the face in each part, then combine them back into one video. (For something like what you see in professional movies, where the subject is moving all over the frame and is still blurred, the hardware and software to do that can run into the thousands of dollars.)