fix(parser): link collaborative related videos

spec/invidious/videos/related_video_parser_spec.cr

@@ -0,0 +1,41 @@
+require "../../parsers_helper.cr"
+
+Spectator.describe Invidious::Videos::Parser do
+  it "uses the primary owner channel for collaborative related videos" do
+    related = JSON.parse(<<-JSON)
+      {
+        "videoId": "b2_vBMQmi3M",
+        "title": {"simpleText": "Collaborative video"},
+        "shortBylineText": {
+          "runs": [
+            {
+              "text": "D/V and FΛDE",
+              "navigationEndpoint": {
+                "showDialogCommand": {
+                  "panelLoadingStrategy": {
+                    "inlineContent": {}
+                  }
+                }
+              }
+            }
+          ]
+        },
+        "channelThumbnailSupportedRenderers": {
+          "channelThumbnailWithLinkRenderer": {
+            "navigationEndpoint": {
+              "browseEndpoint": {
+                "browseId": "UClr4yKwH072yt1nUX29dQGg",
+                "canonicalBaseUrl": "/@DslashV"
+              }
+            }
+          }
+        }
+      }
+      JSON
+
+    result = Invidious::Videos::Parser.parse_related_video(related).not_nil!
+
+    expect(result["author"].as_s).to eq("D/V and FΛDE")
+    expect(result["ucid"].as_s).to eq("UClr4yKwH072yt1nUX29dQGg")
+  end
+end

src/invidious/videos/parser.cr

@@ -27,6 +27,13 @@ module Invidious::Videos::Parser
     author_verified = has_verified_badge?(related["ownerBadges"]?).to_s
 
     ucid = channel_info.try { |ci| HelperExtractors.get_browse_id(ci) }
+    if ucid.nil? || ucid.empty?
+      channel_renderer = related.dig?(
+        "channelThumbnailSupportedRenderers",
+        "channelThumbnailWithLinkRenderer"
+      )
+      ucid = channel_renderer.try { |renderer| HelperExtractors.get_browse_id(renderer) }
+    end
 
     short_view_count = related.try do |r|
       HelperExtractors.get_short_view_count(r).to_s