Exporting animation from this current r15 to r5 converter

the r15 to r6 converter youtube link - how to make r15 to r6 rig work. - YouTube

the converter model link - R15 - R6 RIG - Roblox

all works fine but is there a way to export the converted r15 to r6 animation?
it works so it changes your rig to r6 but keeps r15 animations so r15 animations are “converted” into r6

i thought about someting like capturing the r6 animation or something