Clip doesn't play to end

[FredNeumann]

Please excuse my English.
I'm playing a media source, mp4, 11mb.
In the recorded stream, this mp4 does not play to the end.
My question:
Where can I make a correction in the settings?
In the source, this runs to the end

Greetings Fred

 

[FredNeumann]

There is a filter on the clip: Chroma Key, is that relevant?