Is this the same as muting the video?
No, and the distinction matters. Muting sets the volume to zero but keeps a silent audio stream inside the file. This removes the stream, so the output genuinely has no audio track at all — which is what platforms and editors expect when you say a clip is silent.
Will removing audio reduce the quality of the video?
Not at all. The video stream is stream-copied rather than re-encoded, so the picture in the output is identical to the source. The only thing that changes is the missing audio track and the bytes it occupied.
Can I remove the audio and add my own instead?
Yes — strip the original here, then use the Voice-over tool to generate narration, or add a track from the Music Library. ViralMint keeps them as separate steps so you can hear each one before committing.
What formats can I use?
MP4, MOV, MKV and WEBM go in; an MP4 comes out. Since the video is copied rather than converted, the picture in that MP4 is exactly the stream from your source file.