It's good to see this post in my feed today!

I'm experiencing problems with my latest post and how the thumbnail isn't appearing in the preview/blog list/blog feed. It's just a grey box instead of my photo, which probably cost me views and steem. I was looking for solutions and nothing seemed to work. In the post the all images show up perfectly. I was searching ways on how to correct this issue and I've found that other users were experiencing the same issue 11 months ago. One user suggested using your old website Steemimg which I just joined yesterday with makes seeing this post today pretty funny.

What I think happened was one of two possibilities:

1. I cut out the image link data while editing my post to move the image down by one paragraph. I'm guessing I should have moved the paragraph by cut and paste instead.

2. I added a YouTube link in it's HTML embed format throwing off the entire post's coding/formatting, therefore disabling the thumbnail.

If you could help me out with this that would be awesome. I don't know where else to go being so new here.