1. Server posters no longer auto-load in VideoSprite constructor.
loadServerPoster() is now public and called by the culling system
only when within MAX_POSTER_VIDEOS budget. Videos outside the
budget stay as placeholders regardless of server poster availability.
2. video-utils cleanup() now uses statSync to distinguish files from
directories, unlinks files first, then rmdirs. Previously tmpDir
was passed through path.dirname() which resolved to /tmp instead
of the created temp directory.
Hiren Kangad
e3c3aaf558