Flipping a video on Windows and Mac with PowerDirector:
Step 1: Go to the Menu bar and choose the File menu. Select Import then Media Files…
Step 2: Drag your video from Media Content to the Timeline.
Step 3: Click on the video to bring up the toolbars right above the timeline.
Step 4: Click on Tools.
Step 5: Click on PiP Designer.
Step 6: Scroll down to Flip and select it.
If you don’t see Flip, make sure Advanced is highlighted instead of Express over your video in the preview window.
Step 7: Select either Upside Down or Left to Right, depending on how you want to flip your video.
Step 8: Click OK, then Produce your video or continue editing.