media alignment

Hey,
1. Has to do with the alignment none.. if you align center it shouldn’t do that.
But you can also use this css in your theme options > custom css box:

[class*=wp-image] {
    margin-left: 0;
    margin-right: 0;
}

2. To make videos responsive you need to use either the themes toolkit “youtube shortcode” or a plugin that does something similar like ultimate shortcodes.

Kadence Themes