Not sure if that matches the Op's idea or vision: If thinking on tools used on certain teaching platforms (see possible
Educational technology), like an in-build recorder (audio or video), which makes it easy to provide such files (players are already given by fall-back players, such would be indeed great, but possible a source problem using tools and recorders of third parts. Actually the standard especially language education (Goethe Institute work a great amount with such platforms already worldwide, possible specially in Asia and countries accessing i-net from 0 to 90% in very sort time) and surely a "future-real" reallity while beings desire the realm of internet more and more. Guessing
DModdle-alike things (of which my person came across once. possible
some inspirations.)
The benefit is that the user would not need to have certain software and much burden with up-load, putting links... Something similar to tablets/phones: a possibility to use an inbuild recoder instead of selecting an existing file.