Hi, thanks for opening this issue!

I'm not sure if I properly understand what you mean? I ran both the www. and non-www. version of the URLs and received the subtitles for both runs. Could clarify further or link the affected runs?

Thanks!

I'm sorry I didnt analyze it properly. The problem with missing subtitles seems to be more complicated, not sure what is causing it yet. Is the reason a difference between Web and API runs?

If have two runs (cCdQKqUl4plhJ5Mb0 and OA8ehajbRv589hHg2) with the same input:

{
  "downloadSubtitles": true,
  "hasCC": false,
  "hasLocation": false,
  "hasSubtitles": false,
  "is360": false,
  "is3D": false,
  "is4K": false,
  "isBought": false,
  "isHD": false,
  "isHDR": false,
  "isLive": false,
  "isVR180": false,
  "maxResultStreams": 0,
  "maxResults": 1,
  "maxResultsShorts": 0,
  "preferAutoGeneratedSubtitles": false,
  "saveSubsToKVS": false,
  "startUrls": [
    {
      "url": "https://youtube.com/watch?v=XSWSLIvSTEU",
      "method": "GET"
    }
  ],
  "subtitlesFormat": "plaintext",
  "subtitlesLanguage": "any"
}

In one run (triggered via API in this case), the output lacks the subtitle text (but has the object):

"subtitles": [
      {
        "srtUrl": null,
        "type": "auto_generated",
        "language": "en"
      },
      {
        "srtUrl": null,
        "type": "user_generated",
        "language": "en-US"
      }
    ],

Log:

2025-05-12T14:18:57.745Z ACTOR: Pulling Docker image of build QEcBFHLESKOMqhI1c from registry.
2025-05-12T14:18:57.855Z ACTOR: Creating Docker container.
2025-05-12T14:18:57.903Z ACTOR: Starting Docker container.
2025-05-12T14:19:00.689Z INFO  System info {"apifyVersion":"3.3.2","apifyClientVersion":"2.12.1","crawleeVersion":"3.12.1","osType":"Linux","nodeVersion":"v18.20.8"}
2025-05-12T14:19:01.710Z INFO  Starting scraper with startUrls, ignoring searchQueries
2025-05-12T14:19:02.150Z INFO  CheerioCrawler: Starting the crawler.
2025-05-12T14:19:09.278Z INFO  handling detail url https://youtube.com/watch?v=XSWSLIvSTEU&ucbcb=1
2025-05-12T14:19:12.491Z INFO  Fetching subtitles for https://youtube.com/watch?v=XSWSLIvSTEU&ucbcb=1
2025-05-12T14:19:12.891Z WARN  Reached global limit of 1 items pushed to the dataset. No more items will be pushed
2025-05-12T14:19:12.986Z INFO  CheerioCrawler: All requests from the queue have been processed, the crawler will shut down.
2025-05-12T14:19:12.987Z INFO  Persisting state for videos...
2025-05-12T14:19:12.988Z INFO  Persisting state for comments...
2025-05-12T14:19:13.162Z INFO  CheerioCrawler: Final request statistics: {"requestsFinished":1,"requestsFailed":0,"retryHistogram":[1],"requestAvgFailedDurationMillis":null,"requestAvgFinishedDurationMillis":10699,"requestsFinishedPerMinute":5,"requestsFailedPerMinute":0,"requestTotalDurationMillis":10699,"requestsTotal":1,"crawlerRuntimeMillis":11327}
2025-05-12T14:19:13.163Z INFO  CheerioCrawler: Finished! Total 1 requests: 1 succeeded, 0 failed. {"terminal":true}
2025-05-12T14:19:13.233Z INFO  Persisting state for videos...
2025-05-12T14:19:13.234Z INFO  Persisting state for comments...

Another run (same Input) triggered via Web it has the subtitle:

"subtitles": [
      {
        "srtUrl": null,
        "type": "auto_generated",
        "language": "en",
        "plaintext": "welcome to the show everyone bernardo\ncastro and tom campbell ... long transcript here"
      },
      {
        "srtUrl": null,
        "type": "user_generated",
        "language": "en-US",
        "plaintext": "Welcome to the show everyone, Bernardo Kastrupp and ... long transcript here"
      }
    ],

Log (same as the other):

2025-05-11T21:20:53.750Z ACTOR: Pulling Docker image of build QEcBFHLESKOMqhI1c from registry.
2025-05-11T21:20:53.873Z ACTOR: Creating Docker container.
2025-05-11T21:20:53.914Z ACTOR: Starting Docker container.
2025-05-11T21:20:55.516Z INFO  System info {"apifyVersion":"3.3.2","apifyClientVersion":"2.12.1","crawleeVersion":"3.12.1","osType":"Linux","nodeVersion":"v18.20.8"}
2025-05-11T21:20:56.218Z INFO  Starting scraper with startUrls, ignoring searchQueries
2025-05-11T21:20:56.537Z INFO  CheerioCrawler: Starting the crawler.
2025-05-11T21:21:01.517Z INFO  handling detail url https://youtube.com/watch?v=XSWSLIvSTEU&ucbcb=1
2025-05-11T21:21:03.926Z INFO  Fetching subtitles for https://youtube.com/watch?v=XSWSLIvSTEU&ucbcb=1
2025-05-11T21:21:04.328Z INFO  CheerioCrawler: All requests from the queue have been processed, the crawler will shut down.
2025-05-11T21:21:04.331Z INFO  Persisting state for videos...
2025-05-11T21:21:04.333Z INFO  Persisting state for comments...
2025-05-11T21:21:04.506Z INFO  CheerioCrawler: Final request statistics: {"requestsFinished":1,"requestsFailed":0,"retryHistogram":[1],"requestAvgFailedDurationMillis":null,"requestAvgFinishedDurationMillis":7666,"requestsFinishedPerMinute":7,"requestsFailedPerMinute":0,"requestTotalDurationMillis":7666,"requestsTotal":1,"crawlerRuntimeMillis":8180}
2025-05-11T21:21:04.509Z INFO  CheerioCrawler: Finished! Total 1 requests: 1 succeeded, 0 failed. {"terminal":true}
2025-05-11T21:21:04.566Z INFO  Persisting state for videos...
2025-05-11T21:21:04.569Z INFO  Persisting state for comments...