The braced releases are all legal. The braced flip has a double based prep with a spotter and three under the flipper. The other braced releases have at least two people under them, which is all they need (double base without a spot or single base with a spot).
However, the bracer on the left ends up leaning over too far at the 18 second mark and becomes inverted.This would become illegal. Be careful with and warn your bracers.