Typos are very much a problem in programming. Variables can be set to the wrong value without the programmer noticing, you can call the wrong method (example RotateZ instead of RotateX), and in more advanced programming such as Java/C# reflection the IDE can’t correct you.

Programming is 10% writing code, 80% being up at 3 in the morning wondering whY THE FUCKING CODE WON’T RUN CORRECTLY (it was a typo that you missed despite looking at it over 10 times), and 10% managing expectations

“Viewable source” is the correct term I believe.

Software for recording and live streaming. Stands for Open Broadcasting Software. It is the industry standard at this point.