If by "ytboob video install" you meant getting the YouTube app onto your device, follow these official installation guides.
YouTube Premium is the only legal method to install videos directly from the YouTube app. ytboob video install
"Boob" is slang for a silly mistake or a body part. "Ytboob" could be a joke site. We do not recommend installing anything from a site using that exact spelling. If by "ytboob video install" you meant getting
Conclusion: For the rest of this article, we will assume you meant YouTube. We will teach you how to install official YouTube apps and how to legally install (download) videos for offline playback. Pro: No viruses
There is a very old, obscure open-source tool called youtube-dl (and its forks like yt-dlp). Some misspellings of these tools appear as "ytboob" on typosquatting sites. Warning: Never download from a site called "ytboob." It is not an official Google product.
If you need to save a video file to your computer, open-source software is generally safer than random websites, as the code is publicly audited.