Fixed case typo: ytIframe( should be YtIframe(

README.md

@@ -7,17 +7,17 @@ none
 ## Instruction
 1. Include the script `iframe.min.js` to the bottom of your app: `<script type="text/javascript" src="iframe.min.js"></script>`
 
-2. You can call ytIframe() by either passing a config object:
-`ytIframe({
+2. You can call YtIframe() by either passing a config object:
+`YtIframe({
     https:      true,
     width:      560,
     height:     315,
     videoHash:  'w4yGJEU85wY',
     cookie:     true
 })`
-or by passing the videoHash directly as a string (and thus, using the defaults for size etc.): `ytIframe('w4yGJEU85wY')` You may also pass a full youtube url and ytIframe extracts the hash.
+or by passing the videoHash directly as a string (and thus, using the defaults for size etc.): `YtIframe('w4yGJEU85wY')` You may also pass a full youtube url and ytIframe extracts the hash.
 
-3. ytIframe() returns a DOM object (iframe) which then can be appended to other elements, like: `document.body.appendChild(ytIframe(config));` or `document.getElementById('myVideoDiv').appendChild(ytIframe(config));`
+3. YtIframe() returns a DOM object (IFRAME) which then can be appended to other elements, like: `document.body.appendChild(YtIframe(config));` or `document.getElementById('myVideoDiv').appendChild(YtIframe(config));`
 
 See index.html for four examples, two by passing a string and two by passing a config object.