Video Player plugin for Gear/Galaxy smartwatches.
How to transfer video files to my watch?
First install Video Player Companion from this site. Enable Bluetooth for phone and your watch. Run Galaxy Video Player on your smartwach. On the phone side select a video or/and a subtitle file, choose an option 'Share via', from the list of application choose Video Player Companion. On the watch side you will see the transfer progress.
This plugin uses SAP (Samsung Accessory Protocol). It is Samsung library to transfer files. If you don't have Samsung phone make sure you have installed SAP before start transferring any files.