Doing what it takes to making your blog look professional is very important if you want return visitors.
1:Make sure the videos and images fit.
2:Get a title image that has to do with your blog. (try cool text)
3:Easy access to other posts with links or next button.(try using cool text buttons with a link)
4: Always check your spelling.
5:Link to similar sites(If people don't find what they need on your site having links to other sites might be a reason for them to return)
Take a look at your blog does it look professional?
If not do what you can to make it look as professional as possible.
All so look up help sites that that give you advice.
Her is a few sites you can start with.