Mastergscorner we're aware of the issue and we'll resolve this soon. It's at the top of our priority list.
Basically the plugin we use that embed pictures and videos does not work for the older migrated posts. It only works for any new posts.
Older posts need to be manually edited for them to show the older pictures. So basically if you change a character or add an extra space in one of your older post, the plugin will correctly embed your items.
We have over a 100k - anit nobody got time to do this manually. So we will hire some talent to fix this.