If you are looking for this specific title, the safest and highest-quality way to view it is through verified platforms.
This indicates the resolution. 720p is "Standard High Definition" (1280 x 720 pixels).
When you see a string like this, it is actually a coded description of a digital video file. Each segment provides critical information about the quality and origin of the media:
A marketing tag used by indexers to attract users looking for no-cost downloads. The Risks of "Free" Release Downloads