Can you begin an overtaking manoeuvre under the flyover?

The video shows that you are moving on a multi-lane roadway with one-way traffic. The regulations in Art. 24 of the Road Traffic Act do not prohibit overtaking under viaducts or bridges. Since there are no prohibitory signs (e.g., B-25) or continuous lines at this location and visibility is good, you are allowed to begin such a manoeuvre.