You can increase the quality of your fly-through in the Flight Path Editor dialog. Please note that increasing the quality will also increase the AVI file size and length of time taken to record the video:

1. In the 3D view, click 3D View | Fly-Through | Create/Edit.
2. In the Flight Path Editor, under the Animation section, increase the Frames per second to 30 (or whatever you wish). Increasing this value will increase the smoothness of your recording.
3. Click the Preview button in the to assess the quality of your fly-through. You may wish to further increase or decrease the Frames per second until you are satisfied with the result.
4. Click OK.
5. You can now click 3D View | Fly-Through | Record to record the fly-through with the higher quality settings.

Updated November, 2021