diff --git a/src/js/models/AppModel.js b/src/js/models/AppModel.js
index 261d4d96c..77e9c108c 100644
--- a/src/js/models/AppModel.js
+++ b/src/js/models/AppModel.js
@@ -1747,10 +1747,7 @@ define(["jquery", "underscore", "backbone"], function ($, _, Backbone) {
            * @type {string[]}
            * @since 0.0.0
            */
-          trustedContentSources: [
-            "https://www.youtube.com/embed/*",
-            "https://player.vimeo.com/video/*",
-          ],
+          trustedContentSources: [],
 
           /** If true, then archived content is available in the search index.
            * Set to false if this MetacatUI is using a Metacat version before 2.10.0
diff --git a/src/js/themes/arctic/config.js b/src/js/themes/arctic/config.js
index 481c88b26..7b8b231fb 100644
--- a/src/js/themes/arctic/config.js
+++ b/src/js/themes/arctic/config.js
@@ -260,6 +260,12 @@ MetacatUI.AppConfig = Object.assign(
 
     //Google Analytics
     googleAnalyticsKey: "G-12EKQM14SH",
+
+    // iFrames in portals
+    trustedContentSources: [
+      "https://*arcticdata.io",
+      "https://cosima.nceas.ucsb.edu*",
+    ],
   },
   MetacatUI.AppConfig || {},
 );
diff --git a/src/js/themes/dataone/config.js b/src/js/themes/dataone/config.js
index 6ad97caab..3d1a8c24a 100644
--- a/src/js/themes/dataone/config.js
+++ b/src/js/themes/dataone/config.js
@@ -155,6 +155,14 @@ MetacatUI.AppConfig = Object.assign(
     displayDatasetEditButton: false,
     displayDatasetControls: false,
     displayDatasetQualityMetric: true,
+
+    // iFrames in portals
+    trustedContentSources: [
+      "https://*ecoinformatics.org*",
+      "https://*arcticdata.io",
+      "https://cosima.nceas.ucsb.edu*",
+      "https://sasap-data.shinyapps.io/board_of_fisheries/",
+    ],
   },
   MetacatUI.AppConfig || {},
 );
diff --git a/src/js/themes/knb/config.js b/src/js/themes/knb/config.js
index 241f0cc6f..bf4b72767 100644
--- a/src/js/themes/knb/config.js
+++ b/src/js/themes/knb/config.js
@@ -89,6 +89,13 @@ MetacatUI.AppConfig = Object.assign(
     limitPortalsToSubjects: ["CN=knb-data-admins,DC=dataone,DC=org"],
     portalEditNotAuthCreateMessage:
       "Creating new portals is a feature currently only available to a select group of Beta testers. You should still be able to access your existing portals. Please contact us with any questions at the email address below.",
+
+    // iFrames in portals
+    trustedContentSources: [
+      "https://*ecoinformatics.org*",
+      "https://cosima.nceas.ucsb.edu*",
+      "https://sasap-data.shinyapps.io/board_of_fisheries/",
+    ],
   },
   MetacatUI.AppConfig,
 );