WATCH: Online videos expose how human traffickers are sneaking illegal migrants into US

Videos being published on TikTok by a smuggler are giving an insight into how illegal immigrants are smuggled across the border, in what one journalist describes as a "brazen" display of illegal activity.

The videos, collected by independent journalist Auden Cabello, show migrants moving through gates and marching across territory in northern Mexico, covering their footprints as they go in some cases.

Some of them are in camouflage as they make the treacherous trek north to the U.S.