Add audio to 9 (1 hour) video clips

Dear Freelancers, We have recorded 9 DJ sets live on stage at one of our music events. After uploading them on Youtube we found out that the audio quality is not good enough to listen to. We have also recorded the audio as mp3 files so we would like to edit the mp3 recording into the video recording. The audio should be synchronised to the video, where it is possible then the audio of the video recording itself should also be loud enough to hear as we like to have the crowd noises in the video. The 9 videos are on Youtube so you can download them directly fro Youtube, they are ca 8 GB big in total. The mp3 files are hosted on a free webhost so you can download them from there. Please see the attached txt file for the download links. We are looking for a freelancer who could finish this project tomorrow?