Embedded video controls not shown in Unit 2.1 - Vision Agents with smolagents

In [Vision Agents with smolagents](https://huggingface.co/learn/agents-course/unit2/smolagents/vision_agents), I added an embedded video with the following syntax:

```html

```

Although it has `controls`, when built, this attribute is gone and the video can't be played:


The [`.mdx`](https://raw.githubusercontent.com/huggingface/agents-course/refs/heads/main/units/en/unit2/smolagents/vision_agents.mdx) follows exactly the same pattern as in [this blog](https://huggingface.co/blog/smolagents-can-see) ([`.md`](https://raw.githubusercontent.com/huggingface/blog/refs/heads/main/smolagents-can-see.md)).

Do you know how to solve it?

@burtenshaw @pcuenca