"Discrimination is action that denies social participation or human rights to categories of people based on prejudice." (http://en.wikipedia.org/wiki/Discrimination)
Note the prejudice part.
[1] Not in this context; of course a visual communication discriminates among those who can and can not receive it, but what prejudice is there in just recording yourself talking?
Well it's wrong. Wikipedia's source for that definition is listed as https://www.oxforddictionaries.com/definition/english/discri... but it says: "The unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex."