Chat can be enabled in video properties.

client/@types/peertube.d.ts

@@ -37,7 +37,7 @@ interface RegisterClientFormFieldOptions {
   type: 'input' | 'input-checkbox' | 'input-password' | 'input-textarea' | 'markdown-text' | 'markdown-enhanced'
   descriptionHTML?: string
   default?: string | boolean
-  private: boolean
+  hidden?: (options: any) => boolean
 }
 interface RegisterClientSettingsScript {
   isSettingHidden: (options: {
@@ -46,10 +46,18 @@ interface RegisterClientSettingsScript {
   }) => boolean
 }
 
+interface RegisterClientVideoFieldOptions {
+  type: 'update' | 'upload' | 'import-url' | 'import-torrent' | 'go-live'
+}
+
 interface RegisterOptions {
   registerHook: (options: RegisterClientHookOptions) => void
   peertubeHelpers: RegisterClientHelpers
   registerSettingsScript: (options: RegisterClientSettingsScript) => void
+  registerVideoField: (
+    commonOptions: RegisterClientFormFieldOptions,
+    videoFormOptions: RegisterClientVideoFieldOptions
+  ) => void
 }
 
 interface Video {

client/admin-plugin-client-plugin.ts

@@ -23,6 +23,8 @@ function register ({ registerSettingsScript }: RegisterOptions): void {
           return options.formValues['chat-type'] === 'disabled'
         case 'chat-only-locals-warning':
           return options.formValues['chat-only-locals'] === true
+        case 'chat-per-live-video-warning':
+          return !(options.formValues['chat-all-lives'] === true && options.formValues['chat-per-live-video'] === true)
       }
 
       return false

client/common-client-plugin.ts

@@ -1,5 +1,5 @@
 
-function register ({ registerHook }: RegisterOptions): void {
+async function register ({ peertubeHelpers, registerHook, registerVideoField }: RegisterOptions): Promise<void> {
   registerHook({
     target: 'action:router.navigation-end',
     handler: () => {
@@ -9,6 +9,34 @@ function register ({ registerHook }: RegisterOptions): void {
       }
     }
   })
+
+  const [label, description, settings] = await Promise.all([
+    peertubeHelpers.translate('Use chat'),
+    peertubeHelpers.translate('If enabled, there will be a chat next to the video.'),
+    peertubeHelpers.getSettings()
+  ])
+  const webchatFieldOptions: RegisterClientFormFieldOptions = {
+    name: 'livechat-active',
+    label: label,
+    descriptionHTML: description,
+    type: 'input-checkbox',
+    default: true,
+    hidden: ({ liveVideo }) => {
+      if (!liveVideo) {
+        return true
+      }
+      if (!settings['chat-per-live-video']) {
+        return true
+      }
+      if (settings['chat-all-lives']) {
+        // No need to add this field if live is active for all live videos
+        return true
+      }
+      return false
+    }
+  }
+  registerVideoField(webchatFieldOptions, { type: 'update' })
+  registerVideoField(webchatFieldOptions, { type: 'go-live' })
 }
 
 export {