Hi @BatedAlpaca6128,
Welcome to the forums!
The replay system in MSFS is a beta. The developers have asked for feedback on this.
There is a topic here you may contribute to:
https://forums.flightsimulator.com/t/wishlist-for-features-of-built-in-replay-functionality/390484
The current system is a bit complicated as it was used by Asobo in house for doing the trailers; but a post was made here in #community:news-and-announcements:
https://forums.flightsimulator.com/t/new-replay-feature/466973
I hope this helps… some. 