Files with BS4 extension are Video Files. Users should use Mikogo software for managing them. Mikogo session video recordings are stored in BS4 files. These files contain recorded video data from online sessions. They do not have audio data. BS4 files cannot be exported to other formats in Mikogo.
You can play BS4 files back in the Mikogo Session Player utility. On the BeamYourScreen website you will find information about Mikogo, BS4 and other supported formats. To open a BS4 file, the appropriate program supporting the format must be installed.
If you double-click a BS4 file and get an error, you likely do not have the required software. Download and install a program from the list that can open BS4 files. After installing, BS4 files should open with that program by default. Not all programs can perform all operations on BS4 files. Some may only open or view them, while others can convert them to other formats.