I've found bits and pieces scattered around, and maybe everyone already knows this, but when I am linking files (from within Canvas), irritating icons appear next to my links and/or large icons (for videos) present themselves. I wanted them all gone so I could have a cleaner and less bulky appearance.
My method for removing either irritant:
For files (like .pdf) Replace "instructure_file_link instructure_scribd_file" in the html with the simple "inline=disabled".
For videos (like .mp4) Replace "instructure_file_link instructure_video_link" in the html with the same "inline=disabled".
Hope that works for your needs.