Clips too big to play as they are (past 1080p, over the data budget, unmeasurable) stream as HLS from vmedia and play by themselves instead of waiting behind a tap-to-play cover; with Data Saver or a slow link the cover stays.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_013ZDf1cyCQLkfjftYhymZAg

1 files changed, 23 insertions, 7 deletions

diff --git a/src/features/messages.js b/src/features/messages.js
index 693c12f..66bee68 100644
--- a/src/features/messages.js
+++ b/src/features/messages.js
@@ -6728,17 +6728,28 @@ export function messagesFeature(ctx) {
   // Data Saver on, or a slow link: the connection to be careful with
   const frugalData = () => { try { const c = navigator.connection; return !!(c && (c.saveData || /(^|-)2g$|^3g$/.test(c.effectiveType || ''))); } catch { return false; } };
   const tappedClips = new Set(); // asked for by hand this session: plays, whatever it costs
-  function videoHeavy(url) {
-    if (tappedClips.has(url) || largeVideosOk()) return false;
+  // A clip too big to play as it is: over the budget, past 1080p, its index
+  // at the end of a big file — or (known) unmeasurable. Such a clip plays as
+  // an HLS stream where it can (playSrc); else it waits for a tap.
+  function bigClip(url, known = false) {
     const d = videoInfo.get(url) || {};
-    if (d.stream) return false; // a stream takes the rendition the connection carries
     if (d.w && d.h && Math.min(d.w, d.h) > 1080) return true;
-    if (!d.size) return true; // nothing known: don't spend data blind
+    if (!d.size) return !known || d.probed || probeFailedLately(d); // nothing known: don't spend data blind
     if (d.size > videoBudget()) return true;
     // the whole file before the first frame: only worth it for a small one
     if (d.probed && !d.faststart && !d.ranges && d.size > 8e6) return true;
     return false;
   }
+  function videoHeavy(url) {
+    if (tappedClips.has(url) || largeVideosOk()) return false;
+    const d = videoInfo.get(url) || {};
+    if (d.stream) return false; // a stream takes the rendition the connection carries
+    // one that streams costs what the connection carries: it plays like any
+    // other (Adam, 2026-10-18) — but not over Data Saver or a slow link,
+    // where even a stream is the reader's call
+    if (streamsHere(url) && !frugalData()) return false;
+    return bigClip(url);
+  }
   const fmtBytes = (n) => n >= 1e9 ? (n / 1e9).toFixed(1) + ' GB' : n >= 1e6 ? Math.round(n / 1e6) + ' MB' : Math.max(1, Math.round(n / 1e3)) + ' KB';
   function heavyLabel(url) {
     const d = videoInfo.get(url) || {};
@@ -7886,10 +7897,15 @@ export function messagesFeature(ctx) {
     try { return !!document.createElement('video').canPlayType('application/vnd.apple.mpegurl'); } catch { return false; }
   })();
   const longClip = (url) => { const d = videoInfo.get(url) || {}; return d.dur ? d.dur >= HLS_MIN_S : (d.size || 0) >= HLS_MIN_BYTES; };
-  // what a player for this clip loads: the stream for a long one; the copy,
-  // once the original is known not to show here
+  // Long, or too big to play as it is (a 4K clip, a 140 MB one: these
+  // waited for a tap with their cost on them) — streamed at a rendition the
+  // connection carries instead. A small short clip plays as it is: one
+  // request, its own quality, no work for the server.
+  const streamsHere = (url) => vmediaOk(url) && !isHls(url) && canHls() && !hlsFailed.has(url) && (longClip(url) || bigClip(url, true));
+  // what a player for this clip loads: the stream for a long or big one;
+  // the copy, once the original is known not to show here
   const playSrc = (url) => !vmediaOk(url) || isHls(url) ? url
-    : longClip(url) && canHls() && !hlsFailed.has(url) ? hlsOf(url)
+    : streamsHere(url) ? hlsOf(url)
     : !h264Failed.has(url) && (noPicture.has(url) || ((videoInfo.get(url) || {}).hevc && !canHevc())) ? h264Of(url) : url;
   // A player whose clip turns out to have no picture it can show (its
   // metadata says zero width) switches to the copy; if the copy fails too,