That log seems completely unrelated. Try getting the log right from the launcher (and make sure it mentions the RM, so you don't accidentally grab the launcher log instead of the game log).
Ok so the game doesn't actually crash but just doesn't start. Nevertheless I ticked the Open output log when games start option and I could post the launcher output on pastebin but it doesn't paste the whole thing for some reason??
Anyways replay mod did cause a fatal error in the log and i could post that on pastebin : https://pastebin.com/raw/gT322mAc
(This error does not come when I start minecraft without replaymod)