?getvideo=true&type=low&clientip=2409:4073:94:7106:a10d:efb3:5b5c:bc85&vhash=wtjzk2leaxpezmv3c1b2ty9kn29hzz09&ttl=s2jpodrfn1fiwjbvvnvok25mr1rwzz09

: These are security tokens. The vhash is a unique identifier for the video, and ttl (Time To Live) is an expiration timestamp. Important Note on Access

Because this link includes a specific and an expiration token (ttl) , it is likely "session-locked." This means the link will only work for the person who originally generated it and will expire after a short period. : These are security tokens

If you are trying to view a specific "Long Paper" or lecture video: : These are security tokens