Hello, Emiley.
To be fair, your question is a bit too broad and leans toward implementation best practices for any video server, which we don’t provide along with platform recommendations.
As for the Nimble Streamer, its VOD capabilities can be found at https://softvelum.com/nimble/vod-streaming/ page.
More specifically, VOD adaptive bitrate achieved via SMIL files, and the setup process is described at the next page: https://blog.wmspanel.com/2014/04/smil-abr-vod-hls-nimble-streamer.html
Note that Nimble's Transcoder module works for live streams only, not VOD, so you have to prepare different renditions with 3rd party software.
If you require a complete solution, please contact our selected integrators listed at https://softvelum.com/integrators/
I also recommend starting a ticket at wmspanel.com/help, not at the forum.
Thank you.