The following video (from a Civil Aviation thread) shows SV's inaugural 777-200ER from JED landing and taking off at Toronto on Monday.
The takeoff segment starts at 45 seconds. At about the 1:06 or 1:07 mark, about 10 seconds after liftoff, there's what looks like a small puff of smoke. At first I thought it was from the engines (both engines simultaneously), but on looking at it again it might be inboard of the engines.
Just curious what that might be.