WordPress automatic can auto post videos from youtube to wordpress. TrueMag is an awesome premium wordpress theme that can be used for a video blog so here is the correct config to integrate both the plugin and the theme

1- Create a wordpress auotmatic campaign with the type “Youtube” then set your posting options as you like to post either by keyword or from a specific user

2- Set the post format to “Video” this will tell TrueMag to regard the post as a video

3- Set the custom field named tm_video_url to the video source url  [source_link]

4- Remove the [vid_player] tag from the post template not to get the video rendered twice

Here is a test post after saving and running the campaign