Remove multipart upload and 10-minute video feature gates

Ship both video upload features unconditionally:

- Multipart upload is now always attempted. The MultipartFallbackError
  path to the legacy single-request upload is unchanged, so a video
  service without multipart support still works. This makes the plain
  'legacy' upload transport unreachable, so drop it from
  VideoUploadTransport and default the telemetry value to 'multipart'.
- The 10-minute duration cap now applies to everyone.
  VIDEO_10_MINUTE_MAX_DURATION_MS is folded into VIDEO_MAX_DURATION_MS,
  and the composer's duration error message no longer branches on the
  gate.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mn8DoxP5wQk6NbPmapWs9A

src/lib/constants.ts

@@ -194,8 +194,7 @@ export const MAX_LABELERS = 20
 export const VIDEO_SERVICE = 'https://video.bsky.app'
 export const VIDEO_SERVICE_DID = 'did:web:video.bsky.app'
 
-export const VIDEO_MAX_DURATION_MS = 3 * 60 * 1000 // 3 minutes in milliseconds
-export const VIDEO_10_MINUTE_MAX_DURATION_MS = 10 * 60 * 1000
+export const VIDEO_MAX_DURATION_MS = 10 * 60 * 1000 // 10 minutes in milliseconds
 /**
  * Maximum size of a video in megabytes, _not_ mebibytes. Backend uses
  * ISO megabytes.

src/lib/media/video/telemetry.ts

@@ -72,7 +72,7 @@ export function createVideoTelemetry({
   let phaseStartedAt = startedAt
   let jobId: string | undefined
   let uploadBytes: number | undefined
-  let uploadTransport: VideoUploadTransport = 'legacy'
+  let uploadTransport: VideoUploadTransport = 'multipart'
   let txnEnded = false
   let abortBound = true
 

src/lib/media/video/types.ts

@@ -5,7 +5,7 @@
 export type VideoCompressSkipReason =
   'gif' | 'below-byte-threshold' | 'no-webcodecs' | 'compress-error-fallback'
 
-export type VideoUploadTransport = 'multipart' | 'legacy' | 'legacy-fallback'
+export type VideoUploadTransport = 'multipart' | 'legacy-fallback'
 
 export type CompressedVideo = {
   uri: string

src/lib/media/video/upload.ts

@@ -10,7 +10,6 @@ import {
   type CompressedVideo,
   type VideoUploadTransport,
 } from '#/lib/media/video/types'
-import {Features, features} from '#/analytics/features'
 import {type app} from '#/lexicons'
 import {MultipartFallbackError, uploadVideoMultipart} from './multipart/upload'
 import {
@@ -45,23 +44,19 @@ export async function uploadVideo({
   }
   await getVideoUploadLimits(client, i18n)
 
-  if (features.isOn(Features.VideoMultipartUploadEnable)) {
-    try {
-      return await uploadVideoMultipart({
-        video,
-        client,
-        dispatchUrl,
-        setProgress,
-        signal,
-        onStarted: () => onTransport?.('multipart'),
-      })
-    } catch (err) {
-      if (!(err instanceof MultipartFallbackError)) throw err
-      onTransport?.('legacy-fallback')
-      setProgress(0)
-    }
-  } else {
-    onTransport?.('legacy')
+  try {
+    return await uploadVideoMultipart({
+      video,
+      client,
+      dispatchUrl,
+      setProgress,
+      signal,
+      onStarted: () => onTransport?.('multipart'),
+    })
+  } catch (err) {
+    if (!(err instanceof MultipartFallbackError)) throw err
+    onTransport?.('legacy-fallback')
+    setProgress(0)
   }
 
   const uri = createVideoEndpointUrl('/xrpc/app.bsky.video.uploadVideo', {

src/lib/media/video/upload.web.ts

@@ -9,7 +9,6 @@ import {
   type CompressedVideo,
   type VideoUploadTransport,
 } from '#/lib/media/video/types'
-import {Features, features} from '#/analytics/features'
 import {type app} from '#/lexicons'
 import {MultipartFallbackError, uploadVideoMultipart} from './multipart/upload'
 import {
@@ -44,23 +43,19 @@ export async function uploadVideo({
   }
   await getVideoUploadLimits(client, i18n)
 
-  if (features.isOn(Features.VideoMultipartUploadEnable)) {
-    try {
-      return await uploadVideoMultipart({
-        video,
-        client,
-        dispatchUrl,
-        setProgress,
-        signal,
-        onStarted: () => onTransport?.('multipart'),
-      })
-    } catch (err) {
-      if (!(err instanceof MultipartFallbackError)) throw err
-      onTransport?.('legacy-fallback')
-      setProgress(0)
-    }
-  } else {
-    onTransport?.('legacy')
+  try {
+    return await uploadVideoMultipart({
+      video,
+      client,
+      dispatchUrl,
+      setProgress,
+      signal,
+      onStarted: () => onTransport?.('multipart'),
+    })
+  } catch (err) {
+    if (!(err instanceof MultipartFallbackError)) throw err
+    onTransport?.('legacy-fallback')
+    setProgress(0)
   }
 
   const uri = createVideoEndpointUrl('/xrpc/app.bsky.video.uploadVideo', {