Hi, the .mp4 can be an audio file, not an exclusively video format.
Because of some complaints from users we hid the audio files, so that they cannot be found in the mobile device. You can download the recordings from your My Avast account:
- log in to your My Avast Account
- click on the device
- click on "Info"
- click on "Commands""
- right there you will see the recording command
- click the "arrow" on the end of the row and file will be downloaded
Just remember, that the recordings are stored in My Avast account only temporarily (30 days). Therefore we recommend to link the app to your Google account, where you can store them for unlimited period.