How can we retrieve more info from https://release-youtubei.sandbox.googleapis.com?

[ldenoue]

Question

In #748 you show how to request data from a client using https://release-youtubei.sandbox.googleapis.com/youtubei/v1/player

But what other APIs does this provide besides player/

Other details

No response

Checklist

• I am running the latest version.
• I checked the documentation and found no answer.
• I have searched the existing issues and made sure this is not a duplicate.
• I have provided sufficient information.

[LuanRT]

It's the same API with the same endpoints, therefore it can do the same things. The only difference is that it is under a different domain.

[rustynail1984]

It's the same API with the same endpoints, therefore it can do the same things. The only difference is that it is under a different domain.

There is one more difference in this domain. This dont have a CORS restriction and can be used in Browser for client side requests.

[LuanRT]

Yes I am aware, this is one of the domains they use for staging and testing. I'm not sure how reliable it is though.

[ldenoue]

This particular endpoint returns only some video details.
Is there an endpoint that returns the list of captions? these are urls with timedtext in them.

[ldenoue]

I found this StackOverflow comment really useful:
https://stackoverflow.com/a/68492807/1158671

curl 'https://www.youtube.com/youtubei/v1/player?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8' -H 'Content-Type: application/json' --data '{  "context": {    "client": {      "hl": "en",      "clientName": "WEB",      "clientVersion": "2.20210721.00.00",      "clientFormFactor": "UNKNOWN_FORM_FACTOR",   "clientScreen": "WATCH",      "mainAppWebInfo": {        "graftUrl": "/watch?v=UF8uR6Z6KLc",           }    },    "user": {      "lockedSafetyMode": false    },    "request": {      "useSsl": true,      "internalExperimentFlags": [],      "consistencyTokenJars": []    }  },  "videoId": "UF8uR6Z6KLc",  "playbackContext": {    "contentPlaybackContext": {        "vis": 0,      "splay": false,      "autoCaptionsDefaultOn": false,      "autonavState": "STATE_NONE",      "html5Preference": "HTML5_PREF_WANTS",      "lactMilliseconds": "-1"    }  },  "racyCheckOk": false,  "contentCheckOk": false}'

If you use https://release-youtubei.sandbox.googleapis.com/youtubei/v1/player instead and omit the key, it:

• returns the full JSON payload with captions
• can be called from a browser environment (no CORS issues).

Laurent