1. Consider the theme and emotional rendering of the video content: choose the appropriate background music according to the theme of the video content and the emotion you want to express. For example, for a Vlog that records life or is relaxed and happy, you can use light and cheerful music; For touching or sad documentaries, we should choose more lyrical and deeper music to enhance emotional rendering.

2. Pay attention to the rhythm and beat of music: the editing and switching of video images should match the rhythm of background music, so that music and images can be integrated to achieve a perfect audio-visual experience.

3. Consider the audience of video content: Audiences of different ages and cultural backgrounds may have different acceptance and preferences for music. Therefore, when choosing background music, we should consider the preferences of the audience and choose tracks that are easy to be widely accepted.

4. Pay attention to copyright and right to use: When using background music, make sure that you have legal rights and avoid infringement. You can achieve this goal by looking for music with free copyright or genuine license.