I need an estimate of how many 500-1000 frame replays it would take to make a 1: 30 minute montage video

50 frames = 1 second
This is an estimate from my research.

Therefore, 1:30 minutes = 90 seconds

50 frames x 90 seconds = 4500 rames

This is an average of 9 replays of 500 frames, or 3 replays of 1500 spars.

ok thanks

Actually it's 60 frames to 1 second, depending on how you record OFC.

Since YT etc only allow 30fps or below you'll be interpolating every other frame, or ditching it completely; so you could get away with running the game at 30fps & recording that.
I recommend recording at 60 regardless. Why? Because that way you can slow things down to half speed if you want without it looking like a slide show. A lot of videos however speed things up especially when they want to sync impacts to the audio.

But eh, it's best to consider 60 ingame frames as 1 second regardless of how much editing stuff together fucks with that metric.

ok