I think he would be better off with a 980 @ 3.7 ghz than a 1045 @ 2.7 ghz.
If he is doing gaming the more cores won't help him as much as the increased clock speed.
IIRC the Thubans OC worse than the Denebs too.
If I had to choose, I would opt for the better gaming performance and slightly worse video editing performance, but the OP can decide that.
The 1045T should win out if the video editing is the most important from a performance standpoint.