What solutions have you tried so far? Did you look for solutions on the Developer Hub?
I have tried looking for solutions on the Developer Hub but I was unable to find anything.
Please tell me if the link to the video stops working.
Im assuming that this is a custom rig here., and if it is how is it structured with its hierarchy? Im also assuming that the Cframe is shown how moving in your converted version onto the RBX animator, but im not sure. Can you send a file of the rig for me to check out?
Additionally I have seen issues with scaling but those are more for rthro rigs.
Sorry for bumping a dead post, but for anyone who needs the solution, I realised what was causing it:
The scale of the model was higher than 1, which made the transfer of keyframes from Moon Animator to the Roblox Animator not work properly. For example, the model I showed above had a scale of about 5 or 10 (I forgot, sorry) and this was causing the extremely spaced-out body parts and exaggerated CFrame movements.