[Vuejs]-No pics or api while generating Nuxt static page

Have you tried to enable spa mode before generating static website ?

mode: 'spa',

And why don’t you use the axios helper directly instead of requiring it ?

this.$axios.get('https://www.googleapis.com/youtube/v3/search', { params })

For your background images you have to use this syntax :

background-image: url('~folder/nameoffile.ext');