I have an .mp4-file, encoded from DVD with Handbrake. Now I'd like to add an extra audio track (with another language) to the .mp4 file but I haven't found a good tool to do this. Any suggestions?

When an app is literally called “Any Format” it will support any format. This is your go-to app if you have small and large files of various formats lying around ...

There’s always the need to download and convert YouTube videos to MP3, MP4 or other video formats. These days, developers want us to use apps, but for those who want to do things a little differently, ...