The following endpoints help to get the List Item from Document library based on if its id is 1 and then expands the properties of File.
http://<SharePointSite>/_api/web/lists/getbytitle('Documents')/getitembyid(1)?$select=File&$expand=File
or
http://<SharePointSite>/api/web/lists/getbytitle('Videos')/items?files?$filter=Id eq 1&$select=File$expand=File
This endpoint returns the following properties of the file,
- CheckInComment
- CheckOutType
- ContentTag
- CustomizedPageStatus
- ETag
- Exists
- IrmEnabled
- Length
- Level
- LinkingUrl
- MajorVersion
- MinorVersion
- Name
- ServerRelativeUrl
- TimeCreated
- TimeLastModified
- Title
- UIVersion
- UIVersionLabel
- UniqueId