If your lecture video is displaying upside down, it's likely due to how some iOS devices record video. Here are two effective, free solutions:

Option 1: Handbrake
• Download Handbrake from handbrake.fr.
• Use the rotation option to rotate your video 180 degrees.

Option 2: VLC
• Download VLC from videolan.org.
• Follow these instructions to rotate your video: Rotate Video with VLC.

For Future Recordings:
Check out this YouTube tutorial for tips on recording with an iPhone: How to Record with an iPhone.

These methods should help correct the orientation of your video. Let me know if you need any further assistance!