In Wave.video, you can record a voiceover right in the editor, when creating your video.
Click on the audio track and select Record Voice:
Voiceover 7 Steps
Click the Microphone
Click Record Voice
Speak after the countdown
When you are finished, click the black square
Listen to playback by clicking the black arrow
If you are not happy with your voiceover click the red REC button to record over your original
When you are happy with your voiceover
6. Click Add Voice
Be patient and allow time for uploading
7. Place your voiceover where you would like it in your video by moving it left or right
Just like with other audio files, you will be able to trim the voiceover piece, change its volume and add a fade in/fade out effect.
Your voiceover files can be found in your Uploads
In your Uploads you can rename your files and move them into folders or subfolders that you have created.