[Lynx-dev] Hou does Lynx render this????

[Hal.sz S.ndor]

See
https://www.youtube.com/playlist?list=PLQ-omVVosGTSGB9C3hmUsLit8fQyVdjT1
and search for "sikeres" (a distinctive word with letters all in ASCII).
I looked at the source, as Firefox gave me it, and that whole block of 
writing is within some JSON construct.
I connected with Lynx, and Lynx shows it. The source, as Firefox shows 
it, and as Lynx shows it, are quite different, eg, Firefox shows an 
element "yt-formatted-string" which Lynx not.
What goes on here? Are servers now offering webpages in styles according 
to webbrowser?