Set the shards behind the post to match the Depth of field in the footage aswell as adding grain to sit in the footage better. I've used Reel Smart Motion Blur to add motion blur quickly based on pixel motion. This is a really quick way of adding realism to 3D renders rather than use the very slow and unreliable motion blur within C4D's render engine. Colour graded to look quite vibrant and similar in pallete to the first shot. I've boosted the exposure for the post using another iteration of the track matte object buffer to add to the focus in the foreground and emphasise even more the depth within the shot.