Create video crawler / video search engine

I need a script that crawls the internet and searches specifically for Radiology related videos, creates thumbnails of the videos and saves the URL in a MySQL database. Second, a website should provide the videos as thumbnails and links in a categorial way. ## Deliverables I need a script that crawls the internet and searches specifically for Radiology related videos (the search pattern should be able to change later on, e.g. instead of Radiology - then Orthopedics). The search engine should not save the videos itself on the server but create a preview thumbnail which will be saved on the server. Furthermore the URL of the video, title of the video - and if available keyword/tags and description of the video should be saved in a MySQL database. In a second step, a website should provide the videos as thumbnails and links with some of the available text information. Videos should be searchable or browsable based on categories which I will define.