Need to find 1)an easy video effect software to rotate videos or 2) a video converter to convert MP4 into other format for my VLC to play in rotated mode for tonight's DIY LED meeting.

The player I have that plays MP4 cannot rotate the video for easier viewing while another player(VLC) can rotate the video but cannot play MP4 properly.

Please rush help to me ASAP so that every attending club members can view the tutorial better.

Thanks.