A judge has released video footage of two Toronto 18 members receiving a large shipment of fertilizer to construct massive bombs, like the one Timothy McVeigh used in Oklahoma City.

The two men in the video are Saad Gaya and Saad Khalid, who both pleaded guilty to participating in a terror plot with the intention of causing an explosion.

Surveillance footage shows the two men handling the shipment, before police move in, as part of a sting operation. Officials had actually replaced the fertilizer with an inert substance.

As part of the Crown's case, Mounties detonated one tonne of fertilizer in a Saskatchewan field, to show the destructive force such a weapon could unleash.

Earlier this month, the alleged Toronto 18 mastermind Zakaria Amara, 24, entered a surprise guilty plea to two counts of terrorism. He was alleged to be the chief bomb-maker, and had ordered three tonnes of ammonium nitrate fertilizer.

The bomb that McVeigh used in 1995 contained one tonne of ammonium nitrate. It destroyed a U.S. federal building, leaving 168 people dead and nearly 700 injured.

It is alleged that Amara hoped to kill enough Canadians that the government would withdraw its troops from Afghanistan.

He was recorded on tape saying he wanted to detonate one bomb outside a military base, likely CFB Trenton, a second one near a financial institution in Toronto, and a third fertilizer bomb outside the Toronto offices of CSIS.

When police raided Amara's home, they found bomb-making guides and Islamist texts from the Internet, like "The Clarification Regarding Intentionally Targeting Women and Children."

Amara was 20 years old at the time of his arrest in 2006, married, and had at least one child.

In total, five men have pleaded guilty to various charges. Six men still await trial, and seven have had their charges stayed.