Remove video with wrong content from the introduction. Change "reserved"

to "registered".

Author: sebadoom

stylus/app.styl

@@ -1014,20 +1014,6 @@ body
 
 // plain-text
 
-.video-content
-  padding-bottom 0
-
-  .container
-    max-width 630px
-
-  .intro-video
-    width 100%
-    margin 0 auto
-    display block
-    +breakpoint("tablet")
-      width 600px
-      height 375px
-
 .plain-text
   .container
     max-width 630px

views/introduction.jade

@@ -61,10 +61,6 @@ block content
 
       h1 Introduction to JSON Web Tokens
 
-  section.video-content
-    .container
-      iframe.intro-video(src="//fast.wistia.net/embed/iframe/dxfz716cw9?videoFoam=true&controlsVisibleOnLoad=false&vmode=transparent&preload=metadata&playerColor=292929" allowtransparency="true" frameborder="0" scrolling="no" class="wistia_embed" name="wistia_embed" allowfullscreen mozallowfullscreen webkitallowfullscreen oallowfullscreen msallowfullscreen)
-
   section.plain-text
     .container
       include:markdown md/introduction.md

views/md/introduction.md

@@ -47,15 +47,15 @@ Then, this JSON is **Base64Url** encoded to form the first part of the JWT.
 ### Payload
 
 The second part of the token is the payload, which contains the claims. Claims are statements about an entity (typically, the user) and additional metadata.
-There are three types of claims: *reserved*, *public*, and *private* claims.
+There are three types of claims: *registered*, *public*, and *private* claims.
 
-- [**Reserved claims**](https://tools.ietf.org/html/rfc7519#section-4.1): These are a set of predefined claims which are not mandatory but recommended, to provide a set of useful, interoperable claims. Some of them are: **iss** (issuer), **exp** (expiration time), **sub** (subject), **aud** (audience), and [others](https://tools.ietf.org/html/rfc7519#section-4.1).
+- [**Registered claims**](https://tools.ietf.org/html/rfc7519#section-4.1): These are a set of predefined claims which are not mandatory but recommended, to provide a set of useful, interoperable claims. Some of them are: **iss** (issuer), **exp** (expiration time), **sub** (subject), **aud** (audience), and [others](https://tools.ietf.org/html/rfc7519#section-4.1).
 
 	> Notice that the claim names are only three characters long as JWT is meant to be compact.
 
 - [**Public claims**](https://tools.ietf.org/html/rfc7519#section-4.2): These can be defined at will by those using JWTs. But to avoid collisions they should be defined in the [IANA JSON Web Token Registry](https://www.iana.org/assignments/jwt/jwt.xhtml) or be defined as a URI that contains a collision resistant namespace.
 
-- [**Private claims**](https://tools.ietf.org/html/rfc7519#section-4.3): These are the custom claims created to share information between parties that agree on using them and are neither *reserved* or *public* claims.
+- [**Private claims**](https://tools.ietf.org/html/rfc7519#section-4.3): These are the custom claims created to share information between parties that agree on using them and are neither *registered* or *public* claims.
 
 An example payload could be: