If you want to remove author name then you need to follow this. 

We are using Red Color on our demo so our CSS file is stylesheet-red.css

1- Remove Author name from Single post page 

beetube/css/shylesheet-red.css Line Number : 1910
Here You will see this code.

.single-post .author{
    background:url(images/icons-red.png) no-repeat -5px -25px;
    padding-left:25px;
    margin-right:10px;
    }

Replace with :

.single-post .author{
    background:url(images/icons-red.png) no-repeat -5px -25px;
    padding-left:25px;
    margin-right:10px;
    display: none;
    }

2- Remove from home page / category page. 

beetube/css/shylesheet-red.css Line Number : 1897

Here You will see this code.

.author{
    background:url(images/auther-icon.png) no-repeat left;
    padding-left:25px;
    margin-right:10px;
    }

Replace with :

.author{
    background:url(images/auther-icon.png) no-repeat left;
    padding-left:25px;
    margin-right:10px;    
    display: none;
    }