https://borisfx.com/documentation/sapphire/ae/reverseedits/
Sapphire Plug-ins for After Effects: ReverseEdits | Boris FX
S_ReverseEdits Independently reverses segments of the input clip. For example if Edit Frame Length is 5, and the input clip frames are: 1 2 3 4 5 6 7 8 9 10...
plug insafter effectssapphireborisfx