diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 9aaa645fd..133179e8d 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -392,7 +392,7 @@ if [ ! -f ${SRS_OBJS}/st/libst.a ]; then echo "Build state-threads static lib fa
 function write_nginx_html5()
 {
     cat<<END > ${html_file}
-<video autoplay controls autobuffer type="application/vnd.apple.mpegurl"
+<video width="100%" autoplay controls autobuffer type="application/vnd.apple.mpegurl"
     src="${hls_stream}">
 </video>
 END
diff --git a/trunk/research/players/rtc_player.html b/trunk/research/players/rtc_player.html
index b59fee4ec..3cc526c82 100644
--- a/trunk/research/players/rtc_player.html
+++ b/trunk/research/players/rtc_player.html
@@ -49,7 +49,7 @@
     </div>
 
     <label></label>
-    <video id="rtc_media_player" controls autoplay></video>
+    <video id="rtc_media_player" width="100%" controls autoplay></video>
 
     <label></label>
     SessionID: <span id='sessionid'></span>
diff --git a/trunk/research/players/srs_gb28181.html b/trunk/research/players/srs_gb28181.html
index b32acf276..660b04fbc 100644
--- a/trunk/research/players/srs_gb28181.html
+++ b/trunk/research/players/srs_gb28181.html
@@ -347,7 +347,7 @@
                 <h3><a href="https://github.com/ossrs/srs">RtcPlayer</a></h3>
             </div>
             <div class="modal-body">
-                <video id="rtc_media_player" controls autoplay ></video>
+                <video id="rtc_media_player" width="100%" controls autoplay ></video>
             </div>
             <div class="modal-footer" id="my_modal_footer">
                 <div>