The Met police officer involved has been suspended by the force and the Independent Office for Police Conduct (IOPC) is investigating.
On Wednesday the Kaba family met Met police commissioner, Sir Mark Rowley, and the IOPC director general, Michael Lockwood, where they were shown the footage.
The family have criticised the amount of time it took for the police officer to be suspended and have accused the force of racism.
Jefferson Bosela, Kaba’s cousin, said his family wants justice for Chris.
Investigators from the IOPC will consider whether race was a factor in the fatal shooting.
Its investigation is expected to take six to nine months.
An inquest into Kaba’s death will be opened on October 4.
An IOPC spokesperson said: “We’re aware of the family’s comments, however we won’t be commenting on our private and confidential meetings with the family of Chris Kaba or their representatives, as we must maintain the integrity of this ongoing criminal investigation.”
Assistant commissioner Amanda Pearson said: “We continue to fully support the IOPC investigation as they work to establish the facts and try to answer the many questions Mr Kaba’s family and others have around his tragic death.”
She added: “We’ve been spending this week speaking with local communities across London, including our Independent Advisory Groups – we know how important it is we listen to their views and concerns and explain as far as we can what is happening.
“We welcome more of these important conversations.
“We are also talking to our firearms officers who continue to fulfill their duties across London, seizing suspected weapons, undertaking firearms warrants and responding to spontaneous incidents.”