Fix video embed streaming, permission inheritance in create dialogs, and default to Guest browsing

Backend/Main.py

@@ -52,6 +52,7 @@ from Groups import (
     SetGroupMembers,
 )
 from Locks import (
+    GetInheritedLock,
     GetLockForPath,
     IsPathAccessible,
     LoadLocks,
@@ -332,6 +333,12 @@ def GetLockEndpoint(Root: str, Path: str, CurrentUser: dict = Depends(GetCurrent
     return GetLockForPath(Root, Path) or {}
 
 
+@Application.get("/api/lock/inherited")
+def GetInheritedLockEndpoint(Root: str, Path: str, CurrentUser: dict = Depends(GetCurrentUser)) -> dict:
+    RequirePathAccessible(Root, Path, CurrentUser)
+    return GetInheritedLock(Root, Path) or {}
+
+
 class SetLockRequest(BaseModel):
     Users: list[str] = []
     Groups: list[str] = []