txt2 - добавить поддержку bilibili

<iframe src="//player.bilibili.com/player.html?isOutside=true&bvid=BV1P4UeYPEtx&p=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"></iframe>

<iframe src="//player.bilibili.com/player.html?isOutside=true&aid=113492732478652&bvid=BV1P4UeYPEtx&cid=26792431323&p=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"></iframe>

https://www.bilibili.com/video/BV1P4UeYPEtx/?share_source=copy_web&t=3
->
https://player.bilibili.com/player.html?isOutside=true&bvid=BV1P4UeYPEtx&p=1&autoplay=1