Greasy Fork is available in English.
从禁止下载的Telegram频道中下载图片、视频及语音消息
Works with the K version only, however sometimes it downloads in QuickTime format which is fine as it can be easily renamed to mp4. The bigger problem is that it can take a long time before downloading. I thought the click didn't register so I clicked multiple times only to have the browser download the same file repeatedly all at once.
As it turns out the time taken depends on the video duration. The downloader waits for the entire video to be buffered first before grabbing the content. For how difficult Telegram has made it to download restricted content, I say this script is good enough.
Works with the K version only, however sometimes it downloads in QuickTime format which is fine as it can be easily renamed to mp4. The bigger problem is that it can take a long time before downloading. I thought the click didn't register so I clicked multiple times only to have the browser download the same file repeatedly all at once.