Video without sound is only half the story. ScreenCrest records system audio and your microphone together, so tutorials and gameplay come out complete.
Record the audio your PC plays — game sound, a video call, music — at the same time as your voice from the mic.
Both tracks are mixed into one MP4, so there is nothing to sync afterwards.
Yes — turn the mic off and keep system audio on.
Yes, both tracks are captured together in one file.