The mod is great, but here's something you can improve:
I see the timeline is inspired from video editing software's timeline like After Effects, i'd really love it i could select multiple keyframes at a time and drag them back and forward, it would make it very easy to speed up or slow down parts of the replay without manually moving the next keyframes (the keyframes ahead)
Also, i'd like a button that creates time-keyframes at the beginning and at the end of the replay (if in the replay the player travels to another dimension, this function would select only the time he's been in that dimension) at normal speed, meaning if the whole replay lasts 50 seconds, it places a time-keyframe at 0 seconds and one at 50 seconds