Professional video (green screen) editing

1. Edit video - supplied as MP4 files - to add information details to 'green screen' (chroma key) videos from materials supplied
* A logo - not too large as to be a distraction from the speaker
* Informational images - a sample is provided
* An neutral background that masks the green screen but doesn't distract from the speaker
2. Crop image to focus on green screen in some scenes
Goal:
This project will start by trialling one video - estimated at 15 minutes long.
The goal is to make the scene understandable to the audience; it doesn't have to be perfect

For this project, the supplier will -
1. Edit one initial scene to produce a good quality result
2. If the successful supplier delivers this to the required standard, they will be offered first refusal on the rest of the videos as a second project.
3. Once a standard has been set, edit more scenes to the same quality. Step 3 will be a separate proposal and (larger) piece of work

Background:
It's one person speaking; for most of the time it needs a plain(ish) background with a company logo next to the speaker.
At certain points the speaker points to an image to one side of the screen; these images need to be added - at the correct point, for the right amount of time.

SAMPLE PIECES
I have uploaded a short example video, logo and image for information purposes only ("TEST Chroma Key")
I have also uploaded a short example where the shot hasn't been framed properly and the background needs cropping ("example green screen error")
I have provided a powerpoint file ("audit illustrations") which includes a powerpoint (editable) version of an illustration, two versions of the logo and a couple of mock-ups to show some ideas - assuming that the rest of the green screen can be edited out in some way.

Please look at the samples, and ask any questions before submitting your proposal