Add Mark Heath's videos on zipping operators

Author: atifaziz

Diff for: m/equi-zip.md

@@ -8,6 +8,11 @@ if the input sequences are of different lengths.
 // TODO add example
 ```
 
+See also [Exploring MoreLINQ Part 1 - Zipping] by [Mark Heath] and his video
+that covers `EquiZip`:
+
+[![Video by Mark Heath](http://img.youtube.com/vi/LmeTMUptJPo/0.jpg)](https://youtu.be/LmeTMUptJPo "MoreLINQ 1 - EquiZip, ZipLongest ZipShortest")
+
 For more details, [see the documentation][doc].
 
 ---
@@ -19,3 +24,5 @@ improvement. Alternatively, you can also [report an issue you see][issue].
 [edit]: https://github.com/morelinq/try/edit/master/m/equi-zip.md
 [issue]: https://github.com/morelinq/try/issues/new?title=EquiZip
 [doc]: https://morelinq.github.io/3.1/ref/api/html/Overload_MoreLinq_MoreEnumerable_EquiZip.htm
+[Exploring MoreLINQ Part 1 - Zipping]: https://markheath.net/post/exploring-morelinq-1-zipping
+[Mark Heath]: https://markheath.net/

Diff for: m/zip-longest.md

@@ -10,6 +10,11 @@ for padding.
 // TODO add example
 ```
 
+See also [Exploring MoreLINQ Part 1 - Zipping] by [Mark Heath] and his video
+that covers `ZipLongest`:
+
+[![Video by Mark Heath](http://img.youtube.com/vi/LmeTMUptJPo/0.jpg)](https://youtu.be/LmeTMUptJPo "MoreLINQ 1 - EquiZip, ZipLongest ZipShortest")
+
 For more details, [see the documentation][doc].
 
 ---
@@ -21,3 +26,5 @@ improvement. Alternatively, you can also [report an issue you see][issue].
 [edit]: https://github.com/morelinq/try/edit/master/m/zip-longest.md
 [issue]: https://github.com/morelinq/try/issues/new?title=ZipLongest
 [doc]: https://morelinq.github.io/3.1/ref/api/html/Overload_MoreLinq_MoreEnumerable_ZipLongest.htm
+[Exploring MoreLINQ Part 1 - Zipping]: https://markheath.net/post/exploring-morelinq-1-zipping
+[Mark Heath]: https://markheath.net/

Diff for: m/zip-shortest.md

@@ -13,6 +13,11 @@ var zipped  = numbers.ZipShortest(letters, chars, flags, (n, l, c, f) => n + l +
 WriteLine(zipped);
 ```
 
+See also [Exploring MoreLINQ Part 1 - Zipping] by [Mark Heath] and his video
+that covers `ZipShortest`:
+
+[![Video by Mark Heath](http://img.youtube.com/vi/LmeTMUptJPo/0.jpg)](https://youtu.be/LmeTMUptJPo "MoreLINQ 1 - EquiZip, ZipLongest ZipShortest")
+
 For more details, [see the documentation][doc].
 
 ---
@@ -24,3 +29,5 @@ improvement. Alternatively, you can also [report an issue you see][issue].
 [edit]: https://github.com/morelinq/try/edit/master/m/zip-shortest.md
 [issue]: https://github.com/morelinq/try/issues/new?title=ZipShortest
 [doc]: https://morelinq.github.io/3.1/ref/api/html/Overload_MoreLinq_MoreEnumerable_ZipShortest.htm
+[Exploring MoreLINQ Part 1 - Zipping]: https://markheath.net/post/exploring-morelinq-1-zipping
+[Mark Heath]: https://markheath.net/