fix youtube embed styles (#88)

Author: johnymontana

modus/deepseek-model.mdx

@@ -52,13 +52,13 @@ Distilled models offer similar high reasoning capabilities with fewer
 parameters.
 
 <iframe
-  width="560"
-  height="315"
   src="https://www.youtube.com/embed/ICRwZ8ywR9Q"
   title="DeepSeek + Modus"
   frameborder="0"
-  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+  allow="accelerometer; autoplay; clipboard-write;
+encrypted-media; gyroscope; picture-in-picture"
   allowfullscreen
+  style={{ aspectRatio: "16 / 9", width: "100%" }}
 ></iframe>
 
 <Steps>