r"
(?:(?# Pattern before filename
)(?:\[download\] )?Destination: (?#
)|(?#
)\[download\] (?#
)|(?#
)Adding metadata to \"(?#
))(?#
)((?# CAPTURE GROUP: filename pattern
)\/?[^\/\\\n]+(?:\/|\\)(?# Capture first folder
)(?:(?#
)[^\n\.]*(?# Stop capturing if point, to check
)(?!\.f\d{1,4}\.(?:webm|mov|mp4))(?# Checking this is not a partial download
)\.(?# Can now capture the point
))+(?#
)(?:webm|mov|mp4)(?#
))(?#
)\n?
"
gm