AWS encrypted HLS (URL?)

In the documentation here
https://foliovision.com/player/video-security/encoding/mediaconvert-encrypted-hls-guide
it mentions as Step 17):
6. URL: It’s important to get this one right otherwise the video won’t play. The format of that URL is:

https://your-wordpress-site.com/?fv_player_hls_key={Location from step 10.}

My questions:

1. Our site is still under development and uses a different URL, than production will be. Is there a way to add 2 URL’s (dev and production) or any other idea, so that when switching from dev to production we don’t loose all videos?
2. Since the URL requires also the exact S3 location, I am assuming that I will never be able to change any of the Bucket/folder names later on, otherwise the videos will not play any more, is this right?

Thanks for your time!