Can Reaction cards only be played when triggered, or can they also be played as regular Actions during your turn?

Ruling: Reaction cards can be played as regular Actions during your turn or in showdown, not only when triggered. The video's claim that Reactions require a trigger to be played is incorrect.

Nuances:

• During other players' turns, Reactions do require a trigger to be played
• Reactions cannot be played in response to "a showdown being initiated" as the video suggests