This means the source was a broadcast capture (e.g., from ABC, NBC, BBC HD) rather than a Blu-ray or webrip. HDTV rips often have:
Interestingly, "XTM/2" frequently appears in (which you mentioned) as a specific piece of laboratory equipment: the Inficon XTM/2 Deposition Monitor . xtm 2 e01111017hdtvxvidwsavi work
Indicates the source material was captured directly from a high-definition television broadcast stream (usually MPEG-2 or H.264 transport streams) before being compressed. This means the source was a broadcast capture (e