Pretty damn interesting. Some "serious people" are revising their estimates upward that they are aliens.
The new parts to me are that the craft appear to go btwn air and water with ease. And fast moving anomalous underwater craft have been picked up by surveillance tech for years as well. Also there is apparently a clear photo (not yet released) taken by a military aircraft of a triangular craft with rounded edges.
Still maybe most likely a secret usa or foreign military program but it does make you wonder