Yes, but not in the traditional "MP4 file" sense. The official distributors offer offline viewing within their apps. You cannot transfer the file to a pen drive, but you can watch it without the internet on your phone.
When you search for "Yeh Meri Family season 1 download link" on Google or Telegram, you will find hundreds of results. Websites offering "HD 720p" or "1080p" downloads are abundant. However, here is the hard truth about those links: yeh meri family season 1 download link
Originally, the first three episodes of Season 1 were available on The Viral Fever (TVF) YouTube channel. However, many of these have been made private or region-restricted. You might find compilations, but full episode downloads from YouTube (using third-party converters) are illegal and violate YouTube’s Terms of Service. Yes, but not in the traditional "MP4 file" sense