diff --git a/backend/app/routes/channels.py b/backend/app/routes/channels.py
index d458670..b99bac7 100644
--- a/backend/app/routes/channels.py
+++ b/backend/app/routes/channels.py
@@ -36,6 +36,22 @@ def list_channels(
         ).all():
             stored[cid] = count
 
+    # Channels already in the *global* deep-backfill queue — i.e. at least one user (any
+    # user) has requested full history and it isn't done yet. Their whole back-catalogue is
+    # coming for everyone (video data is shared), so the UI shouldn't offer "get full
+    # history" to a user who simply hasn't personally opted in.
+    deep_queued: set[str] = set()
+    if channel_ids:
+        for (cid,) in db.execute(
+            select(Subscription.channel_id)
+            .where(
+                Subscription.channel_id.in_(channel_ids),
+                Subscription.deep_requested.is_(True),
+            )
+            .distinct()
+        ).all():
+            deep_queued.add(cid)
+
     # The user's personal tag links, grouped by channel.
     tags_by_channel: dict[str, list[int]] = {}
     for cid, tag_id in db.execute(
@@ -57,6 +73,7 @@ def list_channels(
             "priority": sub.priority,
             "hidden": sub.hidden,
             "deep_requested": sub.deep_requested,
+            "deep_in_queue": ch.id in deep_queued and not ch.backfill_done,
             "tag_ids": tags_by_channel.get(ch.id, []),
             "details_synced": ch.details_synced_at is not None,
             "recent_synced": ch.recent_synced_at is not None,
diff --git a/frontend/src/components/Channels.tsx b/frontend/src/components/Channels.tsx
index d27bba0..ea073b6 100644
--- a/frontend/src/components/Channels.tsx
+++ b/frontend/src/components/Channels.tsx
@@ -354,24 +354,31 @@ function ChannelRow({
           />
           {c.backfill_done ? (
             <SyncBadge ok label="full" hint="Full history fetched." />
-          ) : (
-            <Tooltip
-              hint={
-                c.deep_requested
-                  ? "Full history requested — this channel's whole back-catalog will backfill as the shared quota allows. Click to cancel the request."
-                  : "Only recent uploads so far. Click to request this channel's full back-catalog (older videos + complete search)."
-              }
-            >
+          ) : c.deep_requested ? (
+            <Tooltip hint="Full history requested — this channel's whole back-catalog will backfill as the shared quota allows. Click to cancel your request.">
               <button
                 onClick={onDeep}
-                className={`inline-flex items-center gap-1 text-[10px] px-1.5 py-0.5 rounded-full border transition ${
-                  c.deep_requested
-                    ? "bg-accent text-accent-fg border-accent"
-                    : "bg-card border-border text-muted hover:border-accent"
-                }`}
+                className="inline-flex items-center gap-1 text-[10px] px-1.5 py-0.5 rounded-full border border-accent bg-accent text-accent-fg transition"
               >
                 <History className="w-3 h-3" />
-                {c.deep_requested ? "full history queued" : "get full history"}
+                full history queued
+              </button>
+            </Tooltip>
+          ) : c.deep_in_queue ? (
+            <Tooltip hint="Another subscriber already requested this channel's full history, so its whole back-catalog is on its way to everyone — nothing to do here.">
+              <span className="inline-flex items-center gap-1 text-[10px] px-1.5 py-0.5 rounded-full border border-accent/40 text-accent">
+                <History className="w-3 h-3" />
+                full history queued
+              </span>
+            </Tooltip>
+          ) : (
+            <Tooltip hint="Only recent uploads so far. Click to request this channel's full back-catalog (older videos + complete search).">
+              <button
+                onClick={onDeep}
+                className="inline-flex items-center gap-1 text-[10px] px-1.5 py-0.5 rounded-full border bg-card border-border text-muted hover:border-accent transition"
+              >
+                <History className="w-3 h-3" />
+                get full history
               </button>
             </Tooltip>
           )}
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index cf50bcb..bf693dd 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -176,6 +176,7 @@ export interface ManagedChannel {
   priority: number;
   hidden: boolean;
   deep_requested: boolean;
+  deep_in_queue: boolean;
   tag_ids: number[];
   details_synced: boolean;
   recent_synced: boolean;