2.
Referring to the second question, the similarities are that Tejanos played the same instruments as Germans, but it could be differentiated because the songs played by Tejanos would have stories added that happened in real life, according to José Morante (7:54).
3.
Lydia Mendoza is a norteño music singer, and in the video she talks about the meaning her songs have for her. Also, she explained that it does not matter what type of song she is singing, what matters is that when she sings, it feels like she is living the song (17:00-19:00).