Finding graphics (pictures, animations, videos, and drawing)

I need ca. 450 illustrations for two-line dialogues. For example: "Is this a house? Yes, this is a house." So in this case I need a picture of a house with a tick/plus (yes). What I need is not only pictures, however, but I'd like to have at least 10% of it as animations, and another 10% in short videos (2-3 seconds long depending on the lenght of the sentences). The remaining 80% will be photos or drawings (but not more than 20% of drawings). In some cases I guess you will need to combine two or more pictures into one collage to express the meaning of the dialogue. The more collages the better. All pictures, videos, drawings and animations must express the dialogue answer very clearly. The materials you provide will be made by you, or they will be Creative Commons licence (You might wish to use [login to view URL]). I will need a list (Word, Excel etc document) of pictures with specification of their source (e.i. source website address(es), confirmation that you draw it, etc ). So it's not just any picture you can find in the web, but a picture/video etc I can legally use for free in a commercial website. You will guarantee that upon finishing the work I get the legal right to use the mateirals on my commerical webpage. They cannot have names of other companies or websites on them, or any other blemishes making them look cheap or unprofessional. All the illustrations must be of high aesthetic quality, artistic, positive and sometimes funny (but not childish). They should be HD quality, ratio 16:9 (like in YouTube clips) but they do not need to be bigger than 8 cm. The pictures are numbered (named) starting with 201 (202, 203, 204...) This is just the firts part, if I'm happy with the cooperation I'll have many more similar jobs.