The first template is for the thumbnail which is the first thing user will see when browsing their Instagram. Keywords are highlighted in yellow opposed to the white colour for the rest of the words.
Username tag is always visible in smaller type just so it won't distract from the main topic but it's always there if the post is shared so other users can search for the username.
As seen in the above photo, the background visuals are related to the main topic as to complement the words with simpler symbols.
And just as important, legend are situated on the top right side of the post as to indicate the gesture or which page are they on.