I know how to rotate a YouTube video (enhancement, rotate, save) but is there a way to rotate multiple videos? I have hundreds of videos and I don't want to rotate them one by one. And I don't want to download them, rotate by myself and then re-upload. Any smart ways?
There is no way to rotate multiple videos in-place on YouTube.
In fact, it is no longer even possible to rotate individual videos in-place on YouTube, as they removed most of the editing capabilities on 22 August, 2018.
If you want to rotate all of your currently uploaded videos, you will have to download, edit, and re-upload them. (Unless you still have your originals, then you only have to edit and re-upload.)
Fortunately, with Google Takeout you can download all of your YouTube videos at once, in their original quality. Once the videos are downloaded, the most efficient way to edit them would likely be to use a tool that supports batch editing or that can be called from a scripting language. I'm not well versed in video editing tools, but this question on Superuser or this one on Video Production SE could be a good starting point.
Seeing how rotation has been stripped from Creator Classic, I thought this would be helpful here. I found a way by modifying the element in Creator Classic.
See my quick tutorial: https://www.youtube.com/watch?v=eDFNQiGZTKY.
I would have answered here (Can I rotate already uploaded videos on YouTube?), but it required much more rep than I have in order to comment.
Unfortunately, YouTube doesn't support multi-edit, so your only option is to do it 1-by-1.
you can use an extension for that:
- install https://chrome.google.com/webstore/detail/
- see demo https://www.youtube.com/watch?v=uj4aFy3YVhU
or you can use brute js force (works for any site):
- press CTRL + SHIFT + C
- add this extension: https://chrome.google.com/webstore/detail/
- set the angles of rotation