Implement isShortFormContent for StreamExtractor and StreamInfo

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamExtractor.java

@@ -554,6 +554,16 @@ public abstract class StreamExtractor extends Extractor {
         return Collections.emptyList();
     }
 
+    /**
+     * Whether the stream is a short-form content. These are content in the style of TikTok,
+     * YouTube Shorts, or Instagram Reels videos.
+     *
+     * @return whether the stream is a short-form content
+     */
+    public boolean isShortFormContent() throws ParsingException {
+        return false;
+    }
+
     public enum Privacy {
         PUBLIC,
         UNLISTED,

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamInfo.java

@@ -342,6 +342,11 @@ public class StreamInfo extends Info {
         } catch (final Exception e) {
             streamInfo.addError(e);
         }
+        try {
+            streamInfo.setShortFormContent(extractor.isShortFormContent());
+        } catch (final Exception e) {
+            streamInfo.addError(e);
+        }
 
         streamInfo.setRelatedItems(ExtractorHelper.getRelatedItemsOrLogError(streamInfo,
                 extractor));
@@ -389,6 +394,7 @@ public class StreamInfo extends Info {
     private List<String> tags = new ArrayList<>();
     private List<StreamSegment> streamSegments = new ArrayList<>();
     private List<MetaInfo> metaInfo = new ArrayList<>();
+    private boolean shortFormContent = false;
 
     /**
      * Preview frames, e.g. for the storyboard / seekbar thumbnail preview
@@ -724,4 +730,12 @@ public class StreamInfo extends Info {
     public List<MetaInfo> getMetaInfo() {
         return this.metaInfo;
     }
+
+    public boolean isShortFormContent() {
+        return shortFormContent;
+    }
+
+    public void setShortFormContent(final boolean isShortFormContent) {
+        this.shortFormContent = isShortFormContent;
+    }
 }