Add videos to relevant Python Core insights

[lizTheDeveloper]

We're going to incorporate video content in Enki soon, but we're going to maintain our commitment to using free, open-source materials. This guy makes amazing Python videos that go over fundamental Python concepts. https://www.youtube.com/user/schafer5/

Attach as many of his videos as you can to as many Python insights as are relevant. Do this by adding a link to the links field, formatted like so:

- '[Install Python Tutorial Video](https://www.youtube.com/watch?v=YYXdXT2l-Gg){video}'

[VimanyuAgg]

Picking this up. I found a few cases where Corey discussed two or more concepts in one video but they are covered in multiple modules in Enki. e.g. For and while loops are discussed in a single video but Enki covers them in two insights - one dedicated to for loop and other to while loop.

Should I provide same link to all insights or provide link in any one of the insight?