Many of the trucks in a column of about 20 vehicles parked on a dirt road have improvised gun turrets or plate-steel armor welded onto them. The video was posted on social media sites Thursday.
Several dozen masked men are heard shouting they are "people of Mencho," a nickname used by Jalisco New Generation Cartel boss Nemesio Oseguera. Almost all of the unformed men wearing bulletproof vests wield assault rifles, and some appear to have belt-fed machine guns or .50 caliber sniper rifles.
Mexico's top security official wrote Saturday that the video is being analyzed to confirm whether it is authentic and when it was made.
But Alfonso Durazo wrote in his Twitter account that "there is no criminal group that has the capacity to successfully defy federal security forces, and much less with this staged event."
The cartel based in the central state of Jalisco has spread across Mexico and increasingly has posed direct challenges to the government. Mexico City's police chief blamed it for an elaborately planned attempt on his life last month — an ambush on the capital's most famous boulevard.
President Andrés Manuel López Obrador met Thursday with Jalisco Gov. Enrique Alfaro to discuss the security issues.