update demo code

src/streamlit_app.py

@@ -13,28 +13,24 @@ forums](https://discuss.streamlit.io).
 In the meantime, below is an example of what you can do with just a few lines of code:
 """
 
-num_points = st.slider("Number of points in spiral", 1, 10000, 1100)
-num_turns = st.slider("Number of turns in spiral", 1, 300, 31)
-
-indices = np.linspace(0, 1, num_points)
-theta = 2 * np.pi * num_turns * indices
-radius = indices
-
-x = radius * np.cos(theta)
-y = radius * np.sin(theta)
-
-df = pd.DataFrame({
-    "x": x,
-    "y": y,
-    "idx": indices,
-    "rand": np.random.randn(num_points),
-})
-
-st.altair_chart(alt.Chart(df, height=700, width=700)
-    .mark_point(filled=True)
-    .encode(
-        x=alt.X("x", axis=None),
-        y=alt.Y("y", axis=None),
-        color=alt.Color("idx", legend=None, scale=alt.Scale()),
-        size=alt.Size("rand", legend=None, scale=alt.Scale(range=[1, 150])),
-    ))
+
+# Set your video directory here
+VIDEO_FOLDER = "synthda_fallingdemo_realreal"
+
+st.set_page_config(layout="centered")
+st.title("AutoSynthDa Pose Interpolation Viewer")
+
+st.markdown("Use the slider to explore how pose interpolation changes as the weight increases.")
+
+# Slider for selecting weight
+weight = st.slider("Interpolation Weight", 0.0, 1.0, step=0.1)
+
+# Construct filename based on weight (rounded to one decimal for file matching)
+filename = f"videos_generated_{weight:.1f}.mp4"
+video_path = os.path.join(VIDEO_FOLDER, filename)
+
+# Check if the video exists
+if os.path.exists(video_path):
+    st.video(video_path)
+else:
+    st.error(f"No video found for weight = {weight:.1f}")