I searched for but could not find an exact match to a known documentary, feature film, or series under that precise title.
However, based on the keywords, here is the most likely connection and a prepared piece about it: Baikal Films (often associated with documentaries about Siberian nature, indigenous peoples, and Russian martial traditions) has produced content focusing on Buryat wrestling or traditional archery in the Lake Baikal region. Little Warriors would logically be a short documentary or a film segment about children training in these sports. baikal films little warriors
Little Warriors: Guardians of the Baikal Spirit I searched for but could not find an
Deep in the Siberian forests near the frozen shores of Lake Baikal, a new generation of boys and girls trains not just to fight, but to preserve the soul of their ancestors. Little Warriors: Guardians of the Baikal Spirit Deep
Baikal Films’ "Little Warriors" takes viewers into the remote villages of Buryatia, where temperatures drop to -30°C. Here, children as young as seven begin their training in Buryat national wrestling (Bukhe Barildaan) and horseback archery.