Related: Do bittorrent programs damage hard disk
I have downloaded app from play store which “is a video player that can stream videos directly from torrents”. TV seems to have internal storage of 16 GB.
Few articles said on torrents damaging “android mini pcs”:
“Now think about downloading a movie from a torrent. To keep the math simple we’ll use an mkv file that’s an even 1GB. If the bits of that file get written, moved around, erased and re-written 18 times as in the previous example, you’ve almost cycled through a 16GB eMMC.“
Would streaming videos from torrent files (which seems to be downloading and making it available for offline usage), in android tv, decrease its lifespan?
I wouldn't worry about it, especially on a device under $100. My SSD on my main computer, as an example, is about 30 months old and has 97% of it's life left. In that time I've read/written over 14TB (Terabytes) to get down to that 97%. I rip all of my DVD / Blu-rays to my device full quality and then transfer them to Plex.
So even if eMMC memory was only 25% of the lifepan, I'd still have over 50% of it's life after writing 14TB. Of course most files like you mentioned before will be much smaller than the 20-30GB files I'm ripping.
TL;DR You will more than likely want to replace your device well before the internal flash memory fails.