Here is a snippet that will enable you to show a short intro (excerpt) of the author bio of a post and not the complete bio. With this snippet you can make an excerpt of the author bio, with a link to the author page, where you can see the full bio.
Add this code to your functions.php
$word_limit=20;// Limit the number of words
$more_txt='read more about:';// The read more text
Sometimes you need to display post-specific content using custom fields. In this example we will show you how you can display custom field data using conditional statements in the form of a youtube video embed. If the post has a “youtube-video-id” defined, the content will be rendered.