Ants vs. fly insect

Ants attacking caterpillar

Ants giving birth to live ants (insects)

Interesting premise...

Stories of insect's world part 1 - Ants at work

From the video's description:
Hi, minna-sama!! Ants are sometimes very funny x3 I recorded them when they worked in front of our apartman in Croatia - so some croatian ants are starring!! :D I made subtitles ^^

Team of ants carrying a force sensor

A team of Aphaenogaster cockerelli foragers carrying an artificial load marked with fig paste to make it attractive to them. Deflections of the sensor arms reveal the forces exerted by each ant. This kind of data can explain how these leaderless groups manage to coordinate so well. In turn, the ants can inspire designs for collective transport by robots.

Team of ants moving a fig

When scouts of the desert ant Aphaenogaster cockerelli find an item too large for a single ant, they quickly organize a small team that lifts and carries it directly to their nest, thus evading more aggressive competitors. This impressive ability is not seen in most ant species, which instead exploit large items in place, cut them into small pieces, or mount much clumsier retrieval efforts.

Ants Transporting Bug in Teamwork

Ants Eating Worm - The Ultimate Survivalists

10 Minutes Of Your Life: Watching Ants Eating a Donut

Ants get honeydew from scale insects

Ants Getting Busy

My visit to the village of ants

Finding Queen Ants

Cambodian ants devour each other

The video's title isn't accurate because it's just some ants bringing a larger ant's dead body back to the nest for food... later. The video was taken in the vicinity of a ruined temple near Angkor Wat, Cambodia.

Antz (Pentax K7 Video)

High quality macro footage of ants at work.

Amazon jungle - parasol ants, termites, etc

The background sound of the Amazon jungle is a constant wall of noise.

Ant jubilee

Ants and a roach....

A poorly focused video of a swarm of ants on the carcass of a cockroach.