You can install any video-player on your machine, such as VLC software or other video-hosting service, but be aware that if you install a software that does not support the formats to which the YouTube videos are embedded, or if your video is not properly encoded or compressed, the video will not play, or at most will become part of the movie or show inside the viewer. YouTube and many sites including YouTube in PDF format is a legal work, and so YouTube in PDF can only play videos found on Google's website and YouTube's servers. But you can play Google's YouTube videos in Microsoft's Office viewer, as the YouTube HTML tags are not in the PDF files, but only inside the HTML files. It would be really nice if Adobe added an option for this, but I've not found an example of it yet. I'm not sure why, but for now I hope it will come soon. In addition, YouTube in PDF, as it is right now, does not support annotations. And if it does, it is currently only showing a “not available” error. YouTube will not download annotations from the source HTML files, but will download them from other online sources or from your computer. For me, having PDF video can cause some issues, because I have to use a non-supported and unsupported PDF viewer for my PDF content. This is all a big deal for me. I'm always trying to find new online service that can convert video files to PDF, and that offers a good PDF viewer like Adobe Reader for me to use. A recent example of this is YouTube's new “YouTube in PDF” feature. I've downloaded and tested a copy of Adobe Captivate 2007, but, just in case, you can download the Adobe Acrobat Reader and use it instead. I recommend you download the latest version (the 2022 version has the bug I've reported). The new 2022 version of Adobe Captivate adds an option to convert video to PDF. So this blog and this blog's content would be compatible with PDF files, and you can use the links in the blog's comment section, that I created, to embed video from YouTube's YouTube Web Player. But, you can't click on one of these files and open the YouTube player; so it can only be viewed in your PDF viewer. After installing in the reader, you'll find that it is not as intuitive as previous versions.