Well we know that Allagans were incredibly advanced, so it is possible that Ragnarok is their technological equivalent of the spell that Lou was trying to cast. Whereas he relied on raw magic and the aether, they constructed a giant machine that would emulate the effects and contain an otherwise uncontainable power. This would fit in with FF usual usage of Ragnarok (an object to hold great power (swords/ships/etc)) as well as the shared symbolism between the summoning of the 12 in the video and the technology.

Bahamut was released from Dalamud, but who put him there in the first place?