We know you know what you discovered for audience but this might help you little bit more while selecitng your best categories. If you are still confused then flipping a coin is best and final idea.
Adhunik: Best known as forever green and long lasting songs of Nepal. If you have something that is smooth in listening then Adhunik is best category for you.
Hip Hop / Rap: Your songs conatins those free rhymes where audience can start their freestyle dancing then Hip Hop / Rap is best selection for you. You might not love to see your audience listening to your songs and get silenced inside a room.
Live performance: If you covered someone else's song or you performed in a concert then Live Performance is best selection. Don't worry about your music categories. Everything that is performed live in stage goes to this category. If your video shows you performing but you attached recorded music behind then it's not for you.
Lok Dohori: All our folk songs representating our country music goes here. Dohori and Folk both goes to this category and remixed version are not approved for this category. Choose something else for your remixed version.
Movie Songs: This section is for those songs which are excerpted from movie.
Pop / Rock / Metal: If we can bang our head or your song contains western influence then this is best category for your song. If you covered our country's folk song and fused it into Guitar with western influence then again you should choose this category.
Unofficial Videos / MP3: you do have songs but not music videos then this category is for you. If you created your video using another video and used screenshot of images then you should choose this category again.
Choose Sub Categories: If you are looking for real audience then it's best for you to choose sub categories. If not, then you might get audience who bangs his head listening to your folk song and even those listener who might sleep while listening to your metal song. So, be accurate with your categories.