When you choose the compression level for videos the file will be compressed slightly and will maintain the quality of the videos?

When you choose the presentation quality compression level for videos the file will be compressed slightly and will maintain the quality of the videos. The presentation quality will not drop a ton, when you chose this level of compression for the files. If you compress the video too much, you can lose the quality of the photos and how they look to the viewer. 

B. false hope it ! : )