diff --git a/index.html b/index.html
index f970fb3..08d8eb0 100644
--- a/index.html
+++ b/index.html
@@ -13,22 +13,22 @@
 	</header>
 
 	<div class="container">
-		<section class="section-episodes">
+		<div class="section-episodes">
 			<div class="episodes">
 				<ul id="episodeList"></ul>
 			</div>
-		</section>
+		</div>
 
-		<section class="section-video">
+		<div class="section-video">
 			<video id="video" controls>
 			</video>
-		</section>
+		</div>
 	</div>
 
 <script>
 	'use strict';
 
-	let episodesList = [177, 178]; // example
+	let episodesList = [177, 178]; /* episodes number list */
 
 	window.onload = function() {
 		let episodeListElement = document.getElementById('episodeList');
@@ -48,7 +48,7 @@
 
 		videoElement.textContent = '';
 		let videoSource = document.createElement('source');
-		videoSource.setAttribute('src', `https://iiiypuk.me/y/o/${episodeId}.mp4`);
+		videoSource.setAttribute('src', `https://a2s.su/y/ep/${episodeId}.mp4`);
 		videoSource.setAttribute('type', 'video/mp4');
 		videoElement.appendChild(videoSource);
 		videoElement.load();
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100644
index 0000000..70f0a51
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1 @@
+editorconfig-checker==2.4.0