In an exclusive interview with Lebanon's Al Mayadeen TV, terrorists from Hamas's "military wing", the Ezzedine al-Qassam Brigades, showcased one of its many terror tunnels, and explained how the group has been preparing for the next round of fighting with Israel.
Islamist terrorists showcased rockets and multiple rocket-launchers in the footage, which aired on Friday.
It comes as senior Hamas officials have rejected any compromise over its demands for an end to fighting with Israel, and threatened a "long war" if its conditions were not met.
Fatah's Al Aqsa Martyr's Brigades has also vowed to step up attacks against Israel when the current temporary ceasefire ends on Monday night.
Talks are continuing in Cairo between Israeli and Palestinian diplomatic teams, but an Israeli official said that the chances of a long-term truce are very slim.