...then withdrew the concession and pursued a recount for over a month when the vote totals changed dramatically.
In no way is a concession legally-binding, nor does it end a race.
If the recount shows that he won, then he won.
This is my understanding but I could be wrong!
The speeches are just a formality. The only thing that determines the outcome is the vote tallies.
A concession, or lack thereof, carries no significance beyond politeness.