Given that the volume shown in an in-line video player (e.g. Flash or Silverlight) is relative to the system volume (i.e. 100% volume in the player is 100% of the current system volume level), what should the default volume of the player be set to?
YouTube and Vimeo default to 100%, and remember your setting across sessions if you change it. JWPlayer defaults to 80%, and some other players that I've seen default to 50%. I can't seem to find any authoritative sources on this, but my inclination is that it should be 100% (with the option to reduce, obviously), as the user has their system volume set to the level they want, already. Any best practices in this arena?