1. Edit .htaccess
2. Enter the following:

Redirect 301 “/path/to/dir/old.pdf” http://www.domain.com/path/to/dir/redirect.pdf

Embed the YouTube video within a container the same as the example below:

<div class="container">
<iframe src="http://www.youtube.com/watch?v=W1xZMfpuuZc?rel=0&showinfo=0" frameborder="0" allowfullscreen class="video"></iframe>
</div>

Add the following to css:

.container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
}
.video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

Add a new (or append if one exists) .htccess just inside the wp-admin directory and insert the following:

order deny,allow
allow from 10.10.10.10
deny from all

*Update 10.10.10.10 with your own IP. You can insert multiple “allow” rows with additional IP addresses.