Captionfy is a free Youtube community captions platform with a subtitles/captions editor that you can use to create captions for any public Youtube video. You can then download the subtitles file, share the Captionfy video page with the captions (using the original Youtube video embed), and provide the Youtuber with a link to the video to download the captions and publish them on Youtube.
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Sonix might be a bit more popular than Captionfy.io. We know about 11 links to it since March 2021 and only 9 links to Captionfy.io. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Some Captionfy users have been creating subtitles for YouTube videos as a way to practice Japanese and other languages, it might be interesting to give a try as well - captionfy.io. Source: almost 2 years ago
Otherwise you can create the subtitles with captionfy.io and people can watch the video with your captions within the platform. It uses the original YouTube video, so the views still go to the YouTuber. Source: almost 2 years ago
This website captionfy.io has a free editor that allows you to create captions and subtitles for YouTube and add colours, italics and etc. Here is a tutorial on how to do it, but site itself is simple enough. Source: about 2 years ago
A recent update from YouTube allows YouTubers now to invite others to be "Subtitle Editors" for their channel. It is the closest they got to the old Community Captions (where anyone could caption the video, not only the "allowed" users). There are also free alternatives to Community Captions like Captionfy and Amara, but probably many YouTubers don't know about them. Source: about 2 years ago
If you want to contribute, but don't know where to get started, I recommend using Captionfy.io or amara.org. Source: about 2 years ago
There's dozens of tools out there for this these days. I'd recommend sonix.ai they give you 30 minutes free. Source: 11 months ago
Do you have a budget? If so, there's this tool I've worked with called Sonix that generates transcripts of what you feed into it. It's not super accurate, but it's good enough. One of the features is that you can "highlight" chunks of text, and have it spit out an XML that will have a sequence containing only the highlighted text. Source: about 1 year ago
Sonix was the one I used because it had 30 free minutes and the video was only 10-11 minutes long. It seems to have done a really decent job, but not sure if that's because the source audio is pretty clear. Source: over 1 year ago
Sonix.ai does many languages and is quite good. Source: over 1 year ago
I am struggling with this as well, but one good tool for me has been sonix.ai, which can transcribe pretty well (posted a little while ago about it). Source: about 2 years ago
PocketTube - Group YouTube subscriptions into YouTube folder. Video Deck for Youtube. Mark as watched videos. Filter YouTube video. Youtube mode
HappyScribe - Happy Scribe automatically transcribes your interviews
NekoCap - Video & Movies
Trint - Transcribe spoken words from your video & audio files
Amara - Amara
Audext - Use online audio to text converter to transcribe any voice recording in minutes.