I like the M-14. I think it was a great battle rifle and a great rifle to shoot as a civilian. The FN was a friend and a powerful companion to Canadian soldiers in the Cold War days of the European theater.
The SMLE was second to none in it's time, and would be a devastating rifle in the right hands to this very day. They speak of the Battle of Mons in your video clip, but please refer also to the Battle of Monchy le-preux, part of the larger Battle of Arras in April 1917, where 10 men from the 1st Newfoundland Regiments Headquarters company, held off an encirclement of the town from a vastly superior and determined German counter-attack of 350-500 trying to complete the encirclement and remove the salient created by the NFLD'ers and the Essex in Monchy into their lines. The NFLD Regimental Commander learned that the Newfoundlanders and the the Essex Regiment had be surrounded further to the east and destroyed by a wounded straggler from the Essex, and was able to do so largely due to this small groups very effective use of the greatest battle rifle ever fielded, the Short, Magazine Lee-enfield!
In today's modern combat world, I would be a great fan of any Canadian style C7A1/A2

or US M16A2 variant as a battle winner with optics, their accuracy, ammo load capacity for the individual soldier and reliability, low recoil and ease of shooting with a very flat shooting round..but also the old No4Mk1 sure feels great with the bayonet attached if they get on you as a club and spear combo....
I just can't buy into the Ak-47,...... something just not right to me, I know they perform impeccably and I've fired them and variants like Galil in past,
and those Canadian legal variants today, and was actually impressed with these new variants accuracy using old surplus corrosive ball ammo at 200meters.