Bit of a glitch on the Astons with it dropping to black briefly as it animates on.
That's a common symptom of a vision mixer keyer configured for one type of key, and a graphics box generating the opposite type of key.
On Sony mixers it's Clean Linear vs Linear, on Snell/SAM/GVG Kahuna it's Luma vs Linear. In other areas it's 'shaped' vs 'unshaped' fill, additive vs multiplicative etc. (It's to do with whether the key signal just modifies the background, and the fill is already modified, or modifies the background and the foreground)
If you use a Linear key when a Clean Linear (in Sony terms) is needed you get double fill shaping - which means extra black edges, and fades through black.
Steve in Pudsey gave kudos