The feature itself worked fine but with my theme, the recent articles were showing in a column on the right and were not responsive so when I had a video inside the left main article column, the video would not adjust to size and lay over the recent article column. I removed this app, just too much work to figure out and customize the theme for it to work.
The design is responsive and happily used by thousands of stores. The issue likely would have been the placement of the snippet as you had it installed in the right column. For help with installation if you choose to give it another shot, refer to: https://www.digitaldarts.com.au/related-blog-posts-shopify-app
Update - the bugs reported 5 months ago still arent fixed
Thanks for creating this app, it generally works well. One issue that I think needs to be looked at is the "exclude Post by tag" function. This doesn't seem to work.
Edit - this is now working, partially. It excludes the blog post from the pool but then leaves a blank space when excluding the post, rather than substituting with another post. i.e. if you have chosen to show 3 blog posts then sometimes only two will show.