From what I can see it's just a users channel that you embed, if so then this should work.
Title: beam
BB Code Tag Name: beam
Replacement:
Code:
<iframe style="width:750px;height:450px;" src="https://beam.pro/embed/player/{param}"></iframe>
Example: [beam]FORKITZ[/beam]
Description: Place the channel name between the beam tags
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
Attachment 155954
You may need to adjust the height and width of the iframe to fit your forum.