These are quality indicators. "RM" often stands for RealMedia (an older format) or a specific rip-type, while "HD" signifies High Definition (720p or 1080p).
These are likely internal upload timestamps or tracker IDs used by content aggregators to show when a file was indexed (e.g., February of 2021). sone155rmjavhdtoday023406 min 2021
In the 2021 digital landscape, "6-minute" clips became a standard for the "freemium" model of media consumption. Most major studios would release a high-definition 6-minute preview (the "sample") to entice viewers to purchase the full-length feature. The string you provided is likely the metadata for one of these high-definition previews. Data Security and SEO "Spam" These are quality indicators