Web development

I need some changes to an existing website. My website is a YouTube like website with a few extra features tailored to musicians. Feature 1: User Tagging in video with the tagged user's specific contribution role. Example: A user on my website uploaded a song and it happens that 3 other people helped make it, so he's going to tag John and select what kind of role John had. In this case let's say John was a bassist. The user proceeds to tag john and select his role from a drop down menu. After that he tags the 2 other people following the same steps. Tagging the user and selecting the user's role through a drop down menu. Feature 2: 2 extra fields in the about section of the user profile. The first is the instruments the user plays. The user may play guitar and piano. So he proceeds to choose guitar from a drop down menu. If he happens to play more than one, he selects more following the same process. We also need another field for the specific kind of gear the user owns. In this section the user adds this information through fields where he or she are able to write whatever they want.