Highlighted text or text background is now a days popular text style on social media. Because, it makes the text readable irrespective of background.
But there is no easy process in easy to use apps like InDesign or Microsoft Word.
Unfortunately, it is also difficult one in Photoshop (at least for now). There are a few different ways to get the look. One is make one rectangle per line behind the text, and then they duplicate the layer, reposition it on the next text line, adjust the rectangle to that line and repeat this process for all text lines.
Obviously it is a very time and energy killing task. In the video, this method is very effective and robust to do this.
#photoshop