Out of Print Archive on Nostr: npub1wkycs…53vnd it lets you build your own flash card stack straight from the app ...

npub1wkycslc70y9wv35rf7ln3sg2dk5v2f7hufgg5wr6qphz6h592jcqk53vnd (npub1wky…3vnd) it lets you build your own flash card stack straight from the app as well.
And from what Norm said, you can download a browser extension to do this with subtitles in Netflix and perhaps YouTube as well I think. Not sure.