Always enables this extension on every site you visit that you didn't blacklist. On whitelisted sites enables this extension only on sites you explicitly whitelisted. Never disables extension on all sites, even on those you whitelisted.
Enable autodetection:
Always enables autodetection on every site this extension is enabled for, unless blacklisted. On whitelisted sites enables autodetection only for sites that you explicitly enabled. Never disables autodetection on all sites, even on those you whitelisted.
Default video alignment:
Default stretch mode:
None: do not stretch the video at all. This is the default option, for men of culture. Basic: stretches video to fit the player or screen unconditionally. If video has letterbox encoded, this option will not try to remove letterbox before stretching. You probably shouldn't be using this option. Hybrid: stretches the video to fit the player, but only if cropping didn't completely remove the black bars. Thin borders: stretches only if the width of black borders after cropping is thin.
Treshold for thin borders can be defined below.