Video editing plus an intro clip for the company required

1. I need a intro video clip showing my company logo plus some fancy images and music. This can be very short i.e. 5 - 8 seconds

2. 3 videos require editing to make them more appealing. Music and text to be added to follow whats being said in the video.
Of the 3 videos, one needs fo be shortened to 1.30 seconds. Total video length to to edited is 12mins. We will showcase both the short and long videos on our website.
The 3rd video involves stitching together other short videos.