To add a photo, video, or GIF to a retweet or quoted tweet, users can choose the retweet with comment option and then choose a media type from the toolbar.
On the Twitter design account, Twitter said that implementing this small change was difficult because it needed to be added in a way that fit well in the Twitter timeline.
During the first usability test, we found it was challenging for people to quickly understand all the content in a Retweet with media. This was due to the layout; two large Tweets stacked on top of each other.
To improve comprehension, we focused on creating hierarchy, prioritizing the author’s voice, and providing more context around the Tweet being Retweeted.
To make quoted tweets and retweets with media make sense, Twitter ultimately decided to make photos, videos, and GIFs full width while showing the original tweet in a condensed, indented box.
Exciting news: Today we are launching the ability to Retweet with GIF, photos, and video!
We find solutions to many challenges as we build for a global, vocal audience. Here is a glimpse into our process as we worked on this feature. http://t.co/PUMr9DRQ0K
— Twitter Engineering (@TwitterEng) May 6, 2019
Tweets with this new formatting are visible solely on mobile devices at the current time, so the layout will look different and not up to date on the desktop.