supercaption means an on-screen caption identifying the place and people being shown. Lexicurio rates it Sui generis — a strength score of 100 out of 100.
Etymology
From super- + caption.
noun
- An on-screen caption identifying the place and people being shown.“A notable difference here is that whereas the BBC uses supercaptions in 15 percent of all items, ITN uses them in 28 percent.”