You have accidentally (?) activated Edit>Tack Changes>Record, likely through its shortcur Ctrl Shift C (spurious use of the Shift key.
Strike the same keys once more or use the menu.
Important: the bugzilla site is not intended to host AskLibO attachments. You could have done so in your question or provided a link to the video. Remove the bug report so as not to clutter the site.
Also, edit your title and question to make the title short and to transfer the problem description inside the question itself.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!