The video clearly shows one of the suspects approaching the ATM with a drill where he drilled two holes in order to insert some type of hose with an explosive liquid. At 3:34 am, you will see a second suspect approach the ATM with what appears to be a lit cigarette which he places on the ground while inserting what appears to be a fuse. He then ignites the fuse with the cigarette, after filling it with liquid gas.
The Federal Authorities do not take this lightly. Multiple Federal Agencies get involved when there are explosives involved. That is why the FBI and the ATF pursued these criminals relentlessly and with the help of this video were able to serve a subpoena on September 28, 2017, which led to their arrest.