In it, the speaker alludes to an imminent threat from the south (Amhara region), from the north (Eritrea) and from within (from federal forces stationed there).
Therefore they deemed it necessary to take preemptive action.
(3/6) On Dec 20, Abere Adamu, Chief Commissioner of Amhara Region Police revealed that the Amhara region had indeed deployed forces to their border right before the war.
This corroborates the transcript speaker's words indicating provocative troop deployments.
(4/6) We also know about large mobilization of Fed gov't troops from Somali region on Nov 1, days before war was declared on Nov 4.
Further corroborating the transcript speaker's claims of provocative southern troop presence.
(5/6) Now to Humera, a Tigrayan town bordering Eritrea and Sudan.
When fighting broke out there on Nov 8 (four days after war was declared), residents reported shells fired from Eritrea -- indicating Eritrean troops were at the ready from the start.
(6/6) It's clear the fed gov't of Ethiopia made the first serious provocations. Movement of soldiers before Nov 4 shows clear beligerent intent on the part of PM Abiy and his collaborators.
All signs indicate that Tigray did indeed act to preempt an attack.