Applying an image sequence to an image plane in Maya

So for shot_05 I want to animate the lighting on the tree branch, so it replicates the sunlight, as shown in the live action timelapse footage.
I've applied an image sequence to my image plane, via the image plane attributes.
I created an image sequence, by exporting it in Premiere and then into Adobe Media Encoder and saved out as targa files.

This is a good link re how to export an image sequence from Premiere
http://help.adobe.com/en_US/PremierePro/4.0/WS1c9bc5c2e465a58a91cf0b1038518aef7-7c92a.html

This is a good link for numbering conventions, including padded numbers (frame numbers that have a specified number of digits, where Os are used to fill the unused digits)
https://knowledge.autodesk.com/support/maya-lt/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/MayaLT/files/FCheck-Frame-numbering-and-padded-numbers-htm.html

Once the image sequence is applied to the image plane (select 'use image sequence' in the Image Plane attribute editor) I can then see, by scrubbing through the timeline, when the sunlight is strong, and when it is obscured by clouds. I will then aim to keyframe the lighting attributes, and create light and shadow on the branches, by adjusting the lighting levels, in time with the moving footage....
A simple playblast throughout the process, will help in detecting any necessary adjustments, prior to render.

How to create an image sequence, on an image plane in Maya
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-28ED30C1-DCF1-406A-9C83-CF7CB92610C8-htm.html