Seafloor bursting with ‘anomalies’: Underwater tornado; Abrupt shift from white seepage to black (VIDEOS)

Throughout the video on the left side of the screen, far away from the ROV, explosive bursts can be seen emanating from the seafloor along with possible methane hydrates.

Increasingly fast seep activity is apparent at 3 minutes in, then a sudden change occurs at 3:12 in, when light-colored seepage (methane hydrates?) abruptly ends, followed by seepage of black blobs (crude oil?).

Underwater Vortex/Tornado observed on left.

is this indicative of a seafloor blowout?

No it's not. Please see links/references I've posted on previous threads.

Sometimes, in the ocean, the water mixes and churns as it flows through the currents.

Get off GLP, read a damn book!