In my opinion the naming convention for those kind of visual elements may vary a lot. However,the one in the image you provided I believed it's called "Over the Shoulder", see an example here. It also could be described as an "Info Box", but again it may vary as long as one could create a whole new set of visual elements and name them anything else.
Many of these elements are sold as ready made video packs, most of the time as editable After Effects files in marketplaces such as videohive.net which usually include elements such as Openers, Lower Thirds, Split Screens, Text Tickers, Over the Shoulder, Info Screens, Bumpers, and many others.