To begin with, the Saxons were instrumental in the collapse of the British based Roman empire.
They entered an alliance with fellow Germanic peoples, such as Scots/Caledonians. Irish/Hibernians, and Franks.
And in 367ad, they collapsed the British based Roman empire.
Though the Romans did rescue the situation temporarily, they would only partially rescue the situation, before surrendering in 410ad.
In the winter of 367, the Roman garrison on Hadrian's Wall rebelled, and allowed Picts from Caledonia to enter Britannia. Simultaneously, Attacotti, the Scotti from Hibernia, and Saxons from Germania landed in what might have been coordinated and pre-arranged waves on the island's mid-western and southeastern borders, respectively. Franks and Saxons also landed in northern Gaul.
These warbands managed to overwhelm nearly all of the loyal Roman outposts and settlements. The entire western and northern areas of Britannia were overwhelmed, the cities sacked and the civilian Romano-British murdered, raped, or enslaved
Secondly, all Saxons are, is Germanics.
Germanics pretty much make up for the entire "white race".
The Saxons in Germany were described by the Romans as a collection of Germanic tribes.
(English translation) "There follow in order the Reudignians, and Aviones, and Angles, and Varinians, and Eudoses, and Suardones and Nuithones; all defended by rivers or forests. Nor in one of these nations does aught remarkable occur, only that they universally join in the worship of Herthum (Nerthus); that is to say, the Mother Earth." —Tacitus, Germania, 40, translated 1877 by Church and Brodribb.2
The new Saxon nation in the Southern part of England was Saxon in name only.
It also comprised of Anglos and Jutes, as Anglos and Jutes were every bit as much a part of the Saxon army, which was a collection of Germanic tribes.
Saxons, Anglos, Jutes, Frisians
In contrast, the British "Saxons", today referred to in English as Anglo-Saxons, became a single nation bringing together Germanic peoples (Frisian, Jutish, Angle)
Jutes are Nordic
Jutes are Nordic
The Jutes (/dʒuːts/), Iuti, or Iutæ (Danish: Jyde, Old English: Ēotas) were a Germanic people.1 According to Bede,2 the Jutes were one of the three most powerful Germanic peoples of their time in the Nordic Iron Age,3
The word Nordic refers to Scandinavia
Iron Age Scandinavia (or Nordic Iron Age) refers to the Iron Age, as it unfolded in Scandinavia.
And Angles were Danish. Click on the link and look at the map to see where Anglesy was.
The Angles (Old English: Ængle, Engle; Latin: Angli; German: Angeln) were one of the main Germanic peoples1 who settled in Great Britain in the post-Roman period.
The Angles already owned Denmark.
The Jutes already owned Norway.
However as this was "old Saxony" the Saxons back then had no royal houses of their own, and were used as an army with the promise of establishing Saxon royal houses in England.
Therefore, most of the Norse-men, were Saxons, as opposed to Anglos, and Jutes.
The vikings left a huge imprint on England, when they removed the last Saxon kings from the throne, before crowning their own, in 1066.
William the conqueror
Descended from Rollo the viking
William I[a] (c. 10281 – 9 September 1087), usually known as William the Conqueror and sometimes William the Bastard,[b] was the first Norman King of England, reigning from 1066 until his death in 1087. He was a descendant of Rollo and was Duke of Normandy from 1035 onward. His hold was secure on Normandy by 1060, following a long struggle to establish his throne, and he launched the Norman conquest of England six years later.
And who was it the Normans removed?
Well, they removed the Saxons, and dethroned them, and reduced them to citizens, just like they had been in Germania.
The last king of the anglo-saxons was Alfred the Great
Alfred the great
Last king of the Saxons
(848/849 – 26 October 899) was King of Wessex from 871 to c. 886 and King of the Anglo-Saxons from c. 886 to 899.
The anglo-saxon kings were replaced by kings with a more Danish line-age
Cnut the great
First king of England
Cnut the Great (/kəˈnjuːt/;4 Old English: Cnut cyning; Old Norse: Knútr inn ríki;[b] died 12 November 1035), also known as Canute, was king of Denmark, England and Norway; together often referred to as the North Sea Empire.
North sea empire
Therefore, the makers of this television documentary are missing crucial points.
You cannot differentiate between Saxon DNA and viking DNA, as many Vikings were Saxons.