Chemistry Video Categorization

Hi, We have list of Chemistry videos, we are looking for someone to categorize videos according to topics and subtopics. Categorization will take place only by looking at video name. For Some videos only topic is required. Most of the videos are in sequence. File is attached. You need to fill the columns in red. Work you need to do: Data in two columns is missing i.e. Topic and Sub Topic. First you need to decide the top level topic of chemistry (these topics should not be more than 8-9) and then sub topics for these topics. Again not more than 6-7 sub topic for each topic. Then you need to Categorize all the videos in the excel sheet according to topics and subtopics.