Video not playing >> Movie Render Queue

Hi everyone
I have two questions that I need your help with.
Question 1:
I loaded two videos in the Movie Render Queue that should play in the timeline from a certain frame.
If you move the timeslider, everything works in the viewport. But if I want to render the sequence in batch rendering, I only get a still image later in the final rendering and the video was not played.

Question 2:
I placed both videos at a specific frame in the timeline, which means that nothing should be visible in the first few frames, but oddly enough, one frame from the video is always displayed there as a still image. Is it possible that as long as the video is not playing, you can always see the first frame?

It would be great if someone could give me some tips here.

Thank you very much in advance.