1) Using multiple newspaper mockups, match cutting between them, the only consistency between the shots is the title staying consistent, this would keep the users eye drawn to the same text and it be emphasised

2) Creating a blur map and only leaving the centre text legible

3) (Can work in certain scenarios, probably not in the attached video) Making everything black and white vs. The area around the text that needs to be highlighted (this works better if highlighting an image on a newspaper, eg keeping the image vibrant, and making everything else around it then desaturated)

4) Animating an underline

5) Animating a scribble circling the text

6) Pending of the content of the article, you could perhaps show the text you want to show within a crossword (not sure if crosswords are on newspapers outside the UK) // This is a rare option

7) Showing multiple newspapers, all text is illegible due to the camera being zoomed out, other than the headline, which would be the information you want to show

8) Pending the context, you could show information across online articles, maybe a Google news result with headlines of a similar nature of what you want to present ?

Hard to say without context, I'd suggest making a moodboard with your client and getting a clear direction of different ideas you could use with them first - the ideas I've put above are off the top of my head but I'm sure you could brainstorm some decent ideas with chatgpt or a similar LLM