video 1.1 fetch() notes

Filing some notes in case I want to record an extra video to go in between 1.1 and 1.2.
* mentioning `try/catch` as error handling option next step
* pointing out that this is just to demo `fetch()` of course just say ``
* Noting that if you use `return` in `getData()` it’ll come back in the promise as `response.`

没有指定文件或测试。首先检查 issue 正文中的 fetch() 和 getData() 位置；完成意味着决定如何记录 try/catch 说明、图像示例，以及 1.1 和 1.2 之间可能存在的视频的返回行为。

由索引模型根据 Issue 内容生成。