CACHE

Some files are not federated, and fetched when necessary. Define their caching policies.
{getCacheSize('previews'), plural, =1 {cached image} other {cached images}}
{{ formErrors.cache.previews.size }}
{getCacheSize('captions'), plural, =1 {cached caption} other {cached captions}}
{{ formErrors.cache.captions.size }}
{getCacheSize('torrents'), plural, =1 {cached torrent} other {cached torrents}}
{{ formErrors.cache.torrents.size }}
{getCacheSize('storyboards'), plural, =1 {cached storyboard} other {cached storyboards}}
{{ formErrors.cache.storyboards.size }}

CUSTOMIZATIONS

Slight modifications to your PeerTube instance for when creating a plugin or theme is overkill.
Write JavaScript code directly.
Example:
console.log('my instance is amazing');
{{ formErrors.instance.customizations.javascript }}
Write CSS code directly. Example:

#custom-css {{ '{' }}
color: red;
{{ '}' }}
Prepend with #custom-css to override styles. Example:

#custom-css .logged-in-email {{ '{' }}
color: red;
{{ '}' }}
{{ formErrors.instance.customizations.css }}