[Feature]: Add a quiet mode for YouTube watch-page commands to avoid auto-play #577
Description
Feature Description
opencli youtube video and opencli youtube transcript currently navigate to the YouTube watch page before extracting metadata or captions. In practice this opens the full watch UI in Chrome and the video starts playing automatically.
This is noisy and disruptive for users who are running OpenCLI as a background utility to fetch metadata or transcripts.
Use Case
As a user, I want YouTube metadata/transcript commands to avoid audible or visible playback side effects so that I can use OpenCLI quietly while working in other tabs or batch-processing videos.
Proposed Solution
After navigating to the YouTube watch page, immediately mute and pause playback before continuing with metadata/transcript extraction.
This should be the default behavior for these read-only commands. No extra flag is needed.
Alternatives Considered
Keeping the current behavior is surprising for commands that are conceptually just reading data.