The YouTube Channel may shed some light. As I understand this, it is not reading the paper, but interpreting or summarizing it with visual cues as to which section it is analyzing.
This seems like a fantastic idea for that purpose.
The free TTS options aren't great still, and "just the abstract" is not the problem. I did full articles, and the hard...er (it was a few hours) part was extracting out the relevant sections of full papers without the 'junk' info (page numbers, superscript citations, 7 pages of authors in any cern paper, etc.
So you get something, but it's often not good.