Question about licensing rights !?

I am a young german youtuber and would like to buy the following opener


As an intro for any of my Youtube videos
I would like to ask:

  1. What license do I need to buy with the regular or the Extendet?

  2. I do not understand the difference between these two license types?

  3. I have to buy for each intro again and again the license or sufficed
    It once the Extendet license to buy?

Please excuse my bad english

Thanks in advance