It is generally not considered legal to transcribe a YouTube video and post it on your blog without permission from the content creator. This is because transcribing a video can be considered a form of copyright infringement, as it involves reproducing a substantial part of the video's content in written form.
Under U.S. copyright law, copyright protection extends to original works of authorship fixed in any tangible medium of expression, including audio and video recordings. Transcribing a video without permission could be seen as a violation of the content creator's exclusive right to reproduce and distribute their work.
Furthermore, many YouTube content creators rely on advertising revenue generated by their videos to make a living. By transcribing their videos without permission, you could be depriving them of potential income.
If you want to use a YouTube video on your blog, it's generally best to ask for permission from the content creator or to use a transcription service that has obtained the necessary permissions. This can help ensure that you're not infringing on the content creator's copyright and that you're respecting their intellectual property rights.
In summary, transcribing a YouTube video and posting it on your blog without permission is generally not considered legal. It's important to respect content creators' intellectual property rights and to seek permission or use a transcription service that has obtained the necessary permissions.