Computer Science Lessons Missing

I haven't explored the computer science section much until today-- I was looking through the videos and articles on my desktop and was super interested and was planning on downloading them on my phone and watching them later... Little did I know a lot of videos I was only able to find on my desktop. I was struggling to find the algorithm videos on my phone-- tried a web search and found it on google; I tapped the link, was lead to the khan academy app and nothing happened. I couldn't visit the desktop site without deleting the app so I was super sad...

Any reason or fix for this ?