diff --git a/spec/invidious/videos/related_videos_extract_spec.cr b/spec/invidious/videos/related_videos_extract_spec.cr
new file mode 100644
index 000000000..71d53eae7
--- /dev/null
+++ b/spec/invidious/videos/related_videos_extract_spec.cr
@@ -0,0 +1,125 @@
+require "../../parsers_helper.cr"
+
+Spectator.describe "parse_related_video" do
+  it "parses a related video from a single-creator channel" do
+    related = JSON.parse(%({
+      "videoId": "BtlWoqWLm9Q",
+      "title": {"simpleText": "Secret History #4: How Evil Triumphs"},
+      "shortBylineText": {
+        "runs": [
+          {
+            "text": "Predictive History",
+            "navigationEndpoint": {
+              "clickTrackingParams": "CAA=",
+              "commandMetadata": {
+                "webCommandMetadata": {
+                  "url": "/channel/UC11aHtNnc5bEPLI4jf6mnYg",
+                  "webPageType": "WEB_PAGE_TYPE_CHANNEL",
+                  "rootVe": 3611,
+                  "apiUrl": "/youtubei/v1/browse"
+                }
+              },
+              "browseEndpoint": {
+                "browseId": "UC11aHtNnc5bEPLI4jf6mnYg",
+                "canonicalBaseUrl": "/@PredictiveHistory"
+              }
+            }
+          }
+        ]
+      },
+      "lengthInSeconds": 7250,
+      "shortViewCountText": {"simpleText": "3.2M views"},
+      "publishedTimeText": {"simpleText": "11 months ago"}
+    }))
+
+    related_video = Invidious::Videos::Parser.parse_related_video(related)
+
+    expect(related_video).not_to be_nil
+
+    expect(related_video.not_nil!["author"].as_s).to eq("Predictive History")
+    expect(related_video.not_nil!["ucid"].as_s).to eq("UC11aHtNnc5bEPLI4jf6mnYg")
+    expect(related_video.not_nil!["short_view_count"].as_s).to eq("3.2M")
+  end
+
+  it "parses a related video with multiple creators (collab)" do
+    related = JSON.parse(%({
+      "videoId": "Qifsxitq_q4",
+      "title": {"simpleText": "Professor Brian Greene: The Threat of AI"},
+      "shortBylineText": {
+        "runs": [
+          {
+            "text": "The Diary Of A CEO and World Science Festival",
+            "navigationEndpoint": {
+              "clickTrackingParams": "CAA=",
+              "showDialogCommand": {
+                "panelLoadingStrategy": {
+                  "inlineContent": {
+                    "dialogViewModel": {
+                      "customContent": {
+                        "listViewModel": {
+                          "listItems": [
+                            {
+                              "listItemViewModel": {
+                                "title": {"content": "The Diary Of A CEO"},
+                                "rendererContext": {
+                                  "commandContext": {
+                                    "onTap": {
+                                      "innertubeCommand": {
+                                        "clickTrackingParams": "CAA=",
+                                        "commandMetadata": {
+                                          "webCommandMetadata": {
+                                            "url": "/channel/UCGq-a57w-aPwyi3pW7XLiHw",
+                                            "webPageType": "WEB_PAGE_TYPE_CHANNEL",
+                                            "rootVe": 3611,
+                                            "apiUrl": "/youtubei/v1/browse"
+                                          }
+                                        },
+                                        "browseEndpoint": {
+                                          "browseId": "UCGq-a57w-aPwyi3pW7XLiHw"
+                                        }
+                                      }
+                                    }
+                                  }
+                                }
+                              }
+                            },
+                            {
+                              "listItemViewModel": {
+                                "title": {"content": "World Science Festival"},
+                                "rendererContext": {
+                                  "commandContext": {
+                                    "onTap": {
+                                      "innertubeCommand": {
+                                        "browseEndpoint": {
+                                          "browseId": "UCshBEKIPwFyXClTBFRwBaBA"
+                                        }
+                                      }
+                                    }
+                                  }
+                                }
+                              }
+                            }
+                          ]
+                        }
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        ]
+      },
+      "lengthInSeconds": 7400,
+      "shortViewCountText": {"simpleText": "1M views"},
+      "publishedTimeText": {"simpleText": "4 days ago"}
+    }))
+
+    related_video = Invidious::Videos::Parser.parse_related_video(related)
+
+    expect(related_video).not_to be_nil
+
+    expect(related_video.not_nil!["author"].as_s).to eq("The Diary Of A CEO and World Science Festival")
+    expect(related_video.not_nil!["ucid"].as_s).to eq("UCGq-a57w-aPwyi3pW7XLiHw")
+  end
+end
diff --git a/src/invidious/videos/parser.cr b/src/invidious/videos/parser.cr
index 8367fcd78..3b0cc10bf 100644
--- a/src/invidious/videos/parser.cr
+++ b/src/invidious/videos/parser.cr
@@ -28,6 +28,19 @@ module Invidious::Videos::Parser
 
     ucid = channel_info.try { |ci| HelperExtractors.get_browse_id(ci) }
 
+    # Videos with multiple creators (collabs) have no browse endpoint on the
+    # byline run. YouTube instead embeds a "Collaborators" dialog under the
+    # run's navigation endpoint, where each list item carries the browse
+    # endpoint of one of the creators. Use the first one as fallback.
+    if ucid.try &.empty?
+      ucid = channel_info.try &.dig?(
+        "navigationEndpoint", "showDialogCommand", "panelLoadingStrategy",
+        "inlineContent", "dialogViewModel", "customContent", "listViewModel",
+        "listItems", 0, "listItemViewModel", "rendererContext", "commandContext",
+        "onTap", "innertubeCommand", "browseEndpoint", "browseId"
+      ).try &.as_s
+    end
+
     short_view_count = related.try do |r|
       HelperExtractors.get_short_view_count(r).to_s
     end