How did I fix a wrong `*.mov` video orientation in Camtasia 2023?

[dmitrii_fediuk]

[dmitrii_fediuk]

Rotating the video -90° in Camtasia does not solve the problem:

[dmitrii_fediuk]

Step 1

How do I remove the rotate flag from a *.mov video created by an iPhone?

Step 2

Step 3

Step 4

Result