Support Muted Video

Muting a video works after playback has started but initializing the video as muted is not currently working. This is most likely this is because of a type conversion between the boolean true/false that videojs provides in options, and whatever value the S7 SDK expects as a parameter

Start by locating the plugin's video initialization and muted-option handling, then compare the boolean value supplied by VideoJS with the parameter expected by the S7 SDK. Done means initializing a video with muted true works while the existing post-playback muting behavior remains intact.

Written by the indexing model from the issue text.