Watched some random videos on youtube and found these decent videos about welding Hastelloy by Nickel Institute.
It's a video series, which include information of TIG, MIG and weld preparation of Hastelloy etc. Guite basic stuff, but does the trick
![Smile :)](./images/smilies/icon_e_smile.gif)
https://www.youtube.com/watch?v=84heSO8oQpE
Enjoy!