Hello Shildatt! It’s unlikely that you would get a virus from a YouTube video itself, as YouTube has security measures in place to prevent malicious content from being uploaded to their platform. However, it is possible to get a virus from downloading videos from YouTube if you download the videos from a third-party website that is not secure.
To ensure that downloaded videos from YouTube are safe, it’s important to only download videos from trusted sources. One way to do this is to use a reputable video downloader program or browser extension. There are many of these available online, but it’s important to do your research and choose one that is reputable and has good reviews.
That being said, it’s possible that the issues with your smartphone are unrelated to the YouTube videos you downloaded. There could be many other factors that are causing the malfunctions. If you continue to experience issues with your phone, it’s a good idea to take it to a professional for diagnosis and repair.
I hope this helps answer your questions!