Groups
Ctrl/Cmd-click selects many. Shift-click selects a range. Drag selected rows to reorder. Switching groups keeps channel selection.
Channels
Use the top search to find channels in every group. Double-click or Rename edits one name. Select many and hit Rename for prefix, suffix, replace, and numbering.
200 fine and reachable.
403 not accessible by you, possibly account, token, or geo-limited.
404 not found. 5xx provider/server error.
CORS browser could reach it, but cannot read the real status without server permission.
Queued waiting for its turn during batch checks.
Select one or more channels first. The list button checks selected channels only, 5 at a time.