Likely a malformed or concatenated log/label. Possible interpretations and suggestions:
Files with these naming patterns typically utilize H.264 or H.265 (HEVC) codecs to maintain that "extra quality" while managing the large file size associated with a two-hour HD video. juq741rmjavhdtoday015900 min extra quality
The string you provided ( juq741rmjavhdtoday015900 ) appears to be a specific identifier, likely a file name, torrent hash, or database record Likely a malformed or concatenated log/label