Police investigating after homeowner stabbed burglar to death during attempted robbery

The transcript discusses the need to investigate a situation, with Sarah planning to visit an address. The speaker also mentions reviewing a video to determine if any part of it can be used, even if it's just still images or unsound footage, to provide new insights.

How does the speaker feel about the possibility of using the video content?

What does the speaker mean by 'even if it's just still unsound'?