Clip from Arte Suave. Xande explains the flower sweep he uses against Marcelo and an escape he used against Jacare.
Interesting to see his hand placement on the flower sweep. The escape he used on Jacare is the exact same technique as the belly out escape against a headlock. Key here is the underhook, which would be needed for a headlock escape or a half guard reversal/escape which Xande was able to do.