More documentation for Grid Compare

- First few seconds must have the title of video printed in large text
- export video in .mov format

use ffmpeg to take a thumbnail 1 second into the video

ffmpeg -itsoffset 1 -i grid-compare-unpack.mov -vframes 1 unpack.jpg

Edit the index.json file in the punch folder:

Add a new video:
- put the video in the public/static/videos folder
- put the thumbnail in the public/static/images folder
- run deploy.sh

deploy.sh will automatically upload static files to s3