general questions on altering stock footage

hi

love this-->
https://dribbble.com/shots/1526562-Animated-Video-widget

1. is there a way to make a video black and white? or do I have to find black and white to have it that way?

2. how do i get stock footage that size? can I shrink stock footage I find to that size?

thanks!

1. You can convert the footage to B&W. Just ask the artist to do that for you.
2. The artist will also gladly downsize the footage for you.