I have been trying unsuccessfully to load any MP4 (H.264 encoding), FLV, or F4V files into a brand new project. I've tried importing FLV and F4V files via the Import to Library and Import to Stage menu choices but all result in "One or more files were not imported because there were problems reading them" error message. I just downloaded Flash CC today (Feb 23, 2014) and cannot even get started on my project since I cannot seem to load a video into the library or stage. I've looked at the tutorials, but they assume that I can choose the greyed out Import Video... menu choice. Searching the discussion didn't help me as most of the discussions are off-topic or from 2 or more years back.
Thanks,
Xtraspatial