I found this great resource for you and have been working on making pages for us of short youtube videos on specific artworks from this website. Click on the links below to check it out!!
https://www.khanacademy.org/test-prep/ap-art-history
Renaissance Art in 15th Century Italy
Renaissance Art in 15th Century Northern Europe and the Iberian Peninsula
https://www.khanacademy.org/test-prep/ap-art-history
Renaissance Art in 15th Century Italy
Renaissance Art in 15th Century Northern Europe and the Iberian Peninsula