To save webpages as PDFs, I use the extension "Print Friendly & PDF". You can find that extension here, https://chrome.google.com/webstore/detail/print-friendly-pdf/ohlencieiipommannpdfcmfdpjjmeolj?hl=en

To download Youtube videos, download the application called 4K Video Downloader. You can find that here, https://www.4kdownload.com/downloads

To download things like Twitter videos or Bitchute videos, just use online conversion tools. Twitter video downloader, https://twittervideodownloader.com/ Bitchute video downloader, https://9xbuddy.org/sites/bitchute

Save stuff right away, because things get deleted very fast, especially Youtube videos. MAGA!