This indicates High Definition (HD) resolution. For a show that started in the late 90s in standard definition, 720p versions are usually sourced from modern digital streaming platforms like SonyLIV.
In the world of video encoding, a "patched" file usually means a bug or error in the original upload (like a sync issue between the audio and video) has been fixed and re-released. The Impact of CID cidseason2episode2720pvegamoviesismkv patched
to ensure the "patched" features (like fixed audio) work correctly. Where to Watch Officially This indicates High Definition (HD) resolution