I have downloaded a video from YouTube. But the uploader has put some link (their twitter and facebook) for promotional purpose. The links keeps coming up through out the video in the black area (up and down of the video which are black). Thank god that links are on the black part of the video otherwise it would be hard to remove.

Also I want to remove the the last few seconds of the video. I don't want to crop that part. The video is in MP4 format. I don't want to lose the quality in anyway, I won't mind if the file size increases.

I want a opensource and free tool. Good if it is available to both Windows and Ubuntu.

Here is a link to the video.