So, in the last few month's in Vine's life cycle, they added an "audio remix" feature. It was an easy-to-use dubbing feature where you can copy audio from another Vine and add it to your vine. Now that Vine is 6 feet under in the social media graveyard, is there another app that can do the same? Not music from your library, but trending audio that may seem funny or etc. (i am trying to add audio to a video already on my camera roll).
You can try Joyoshare Video Joiner to add audio to video.
Only need 3 simple steps:
Step 1. Import videos and choose one output format
Step 2. Click the Exit button to open its video editor and then choose one audio file to be added to videos
Step 3. Press the Convert button to export videos with audios