Do you offer an audio or video player?

While we don't offer any Transloadit-built players, we can wholeheartedly recommend using an open source player such as Plyr. There are plenty of open source or free-to-use alternatives that have matured in ways far beyond what was imaginable a couple of years ago.

See also:

Can Transloadit host my files? What if my users upload video files even though I only use image resizing? What to do if an Assembly Step hasn’t produced any results?