First, is there a simple way to get a video shot to 'sepia' look ?
I have added a Black and White effect to a color video. While I am happy with the result, can I start from there to change to the sepia look (and how ?) - or should I go back to the full color video and proceed from there ?
Thanks for insights,
A quick'n'dirty way to do this would be to create a color matte using a gold/yellow/orange/brown color, place it on the layer above all your other video clips, and set its blending mode to Color. Color mode will use the luminance values of the underlying video to define brightness in the color matte; thinking of it as looking at a scene through a colored filter or gel.
If you have After Effects, you can copy the CycoreFX filters from AE's Plug-ins folder into PPro's Plug-ins folder, and have access to most of those within the Premiere interface. CC Toner is a filter in this collection that remaps luminance values to different colors you select, so you'd have a bit more control this way.