I don't use a 'method'. I use a timer for stuff I don't want to do. I use timer-tab.com A LOT and I also have one of those visual timers. I don't use it all day, and I don't use it for everything. If I need to do something that is boring as hell, like some routine thing for my job, I just set the timer for 10 or 20 minutes. That's it. There is no point in making it complicated. You are overthinking this. Source: over 1 year ago

Timer-tab.com is also great, though you can't embed it in a PPT (at least not easily) - you can set any amount of time, the time will fit your window (great if you need to split the screen), and you can set the background and alarm sound. I had fun changing the background throughout the year for holidays, countdowns to break, test days, etc. Source: almost 2 years ago

Ikr, can't believe I have to have timer-tab.com open so I can easily set a 3 hour timer or whatever. Source: over 3 years ago

Fairly sure that's how the Chromecast SDK works. That will cover a good amount of ground for you, as many modern TVs are chromecast targets. Source: about 2 years ago

But I don't believe Fire TV supports Casting (the specific Google-developed protocol that Chromecast and other devices support). Source: over 2 years ago

This might help: https://developers.google.com/cast. Source: over 3 years ago