The film is set between DA2 and DA3 (ie after the events in Kirkwall, before the Inquisition).
When speaking in DA3 with Cassandra, there are many connections to this story. Selectors are represented a little more, and at the end there is a "reconciliation" to DA3.
The drawing style is not comparable to the movies in the game.
Some stressed the credibility, even for a fantasy world ...
But for three Euro I found it a nice side story in between. Probably only for fans really interesting.