b站使用iframe標籤嵌入，記得src="https://[...]"
b站可以直接轉發iframe。
<iframe src="https://player.bilibili.com/player.html?isOutside=true&aid=114154274817125&bvid=BV1daQAYuEYm&cid=28842855646&p=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"></iframe>
https://player.bilibili.com/player.html?isOutside=true&aid=114154274817125&bvid=BV1daQAYuEYm&cid=28842855646&p=1