Uses FFMPEG to convert audio files to MP4 video for youtube/social platforms. Allows you to add a picture which will be displayed in the video. I reccomend using images in the same resolution as you wish your video to be, for example (1280x720) for 720p etc.
You can drag and drop audio files to this app and it'll convert it into a video.
This app also has several features related to name of the video file, like removing underscores etc.
It also allows you to batch convert audio to video...