Improve Streamlink documentation

CHANGELOG.md

@@ -22,6 +22,7 @@
 - Minor: The whisper highlight color can now be configured through the settings. (#5053)
 - Minor: Added missing periods at various moderator messages and commands. (#5061)
 - Minor: Improved color selection and display. (#5057)
+- Minor: Add a note in `Extarnal Tools` page, `Streamlink`. (#5076)
 - Bugfix: Fixed an issue where certain emojis did not send to Twitch chat correctly. (#4840)
 - Bugfix: Fixed capitalized channel names in log inclusion list not being logged. (#4848)
 - Bugfix: Trimmed custom streamlink paths on all platforms making sure you don't accidentally add spaces at the beginning or end of its path. (#4834)

src/widgets/settingspages/ExternalToolsPage.cpp

@@ -60,6 +60,12 @@ ExternalToolsPage::ExternalToolsPage()
                                  getSettings()->streamlinkUseCustomPath);
         groupLayout->setWidget(2, QFormLayout::SpanningRole, customPathCb);
 
+        auto note =
+            new QLabel("The custom path may not need the file extension.");
+        note->setWordWrap(true);
+        note->setStyleSheet("color: #bbb");
+        groupLayout->setWidget(3, QFormLayout::SpanningRole, note);
+
         auto customPath = this->createLineEdit(getSettings()->streamlinkPath);
         customPath->setPlaceholderText(
             "Path to folder where Streamlink executable can be found");