[PinkMilk]

Using just video id from url:

https://www.bilibili.com/video/BV1Dg4y1B75T

Replacement:

<iframe src="//player.bilibili.com/player.html?bvid={param}" scrolling="no" width="560" height="315" border="0" frameborder="no" framespacing="0" allowfullscreen="true"> </iframe>

Options:
Use {option}
No

Remove Tag If Empty
Yes

Disable BB Code Within This BB Code
Yes

Disable Smilies Within This BB Code
Yes

Disable Word Wrapping Within This BB Code
Yes

Disable Automatic Link Parsing Within This BB Code
Yes

Example:
[bilibili]BV1Dg4y1B75T[/bilibili]


Notes:
I added standard YouTube width and height attributes as the bilibili embed code doesn't seem to come with them.