xAPI is incredibly flexible with the statements that it can report to the LRS. For example, to report that a video was experienced you can set up the following actions.
Create a trigger. In this case, the trigger should be when a video object has reached the end of the video.
To send a statement, use the xAPI statement block. By default, it is set to xAPI: answered.
Use the drop down to change the verb to one of various predefined verbs.
In this case, "experienced" makes the most sense.
Change the Activity ID to something meaningful, as well as the result.
Combine the experienced statement block with the When block.