I have just updated Vegas Pro v19.0 to build 643.
Then I have added a video clip to the timeline and now there is a problem.
The video track of the video on the timeline does not show in the preview window.
The sound track of the video on the timeline plays OK.
Why? Have I missed something?
I have ensured that the video track is not muted on the timeline, and the Mute All Video of the Options menu is not checked.
How can I get the video track to become previewed again?