Copy Video File posted on web & cover top Banner currently being displayed

There is a training video posted on the web which is 52:54 minutes long which I need to copy into a file so that we can post it on our own web site. In addition to copying it I need to have the FIRST 3:25 minutes deleted, cut out or removed and also I need to have deleted, cut out or removed the LAST 1:09 minutes. I also need to replace the top banner portion of the video so that it does NOT show the current advertisement banner and replace it with our own. I need this file so that we can post it on our own website. If you are able to perform this task, please send us a private message (PM) and we will send you the link to the video so that you can determine the scope of this task.