Why does the youtube offline videos get expired Weird behavior of offline videos. I had downloaded a lot videos from office for offline viewing at home. But when i went home they were showing expired and when i clicked on them it showed connect to internet to update. So i went online but even then it was showing connect to update, but after long hours of searching over the internet i couldn't find any solutions. So i first removed them from offline and re-downloaded them. 

That was okay, but the same thing happened today hence i am frustrated. My questions are like this:
1)Why are they getting expired
2)Solution for the above question.

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Apparently YouTube videos downloaded for offline viewing get expired after a certain amount of time. I haven't heard anything official about though.

The downloaded  videos are stored in the internal storage but they are saved as .exo file format which only the YouTube app can open (you can't play them with any other media player app)

The best advice I can give you is to use a YouTube downloader like Tube mate to download the videos.