You can use a relatively cheap Pi as a NAS (network-attached storage - there are ready-made solutions but expensive and don't get updates for nearly as long), and possibly add Kodi media server capabilities (useful for smart TVs). Check if that model supports a sufficiently fast disk interface (USB 3.0, SATA etc.) and Ethernet (100 Mb/s or better if 4K is required). Boot from an SD card and use a 2TB+ HDD (1TB could be enough if you barely store anything). Most disks from the past 10 years will be good enough to play 4K video from if no OS is running from them. Go for a lower-end one but not ridiculously cheap, and check that people aren’t frequently complaining about the model or product line.
I don't know which Pi models can smoothly play HD video without overheating, I don't own any. But those that can are likely a lot more expensive than old PCs you could use otherwise. I would just get a cheap one for a NAS and probably some other common network use cases (web server, Pihole etc.)
My RPi 2B plays HD vids without stuttering or overheating. 4K doesn't work tho, so if you want that, get a newer model. I don't think they even sell the 2B anymore because it's so old.
Yes, I'm using libreelec, I and friends control the display from our phones using the Kore app. Makes searching and typing easy, works great on my Pi. Fun game, which of you will select a movie first on your phones lol.
Note: pi3B can do 1080p but it struggles a little if the codec is anything other than h264, because Kodi decided to stop supporting closed source drivers. If you're playing anything above 1080 and anything other than h264, go for a pi 4 or better.
You can use a relatively cheap Pi as a NAS (network-attached storage - there are ready-made solutions but expensive and don't get updates for nearly as long), and possibly add Kodi media server capabilities (useful for smart TVs). Check if that model supports a sufficiently fast disk interface (USB 3.0, SATA etc.) and Ethernet (100 Mb/s or better if 4K is required). Boot from an SD card and use a 2TB+ HDD (1TB could be enough if you barely store anything). Most disks from the past 10 years will be good enough to play 4K video from if no OS is running from them. Go for a lower-end one but not ridiculously cheap, and check that people aren’t frequently complaining about the model or product line.
I don't know which Pi models can smoothly play HD video without overheating, I don't own any. But those that can are likely a lot more expensive than old PCs you could use otherwise. I would just get a cheap one for a NAS and probably some other common network use cases (web server, Pihole etc.)
My RPi 2B plays HD vids without stuttering or overheating. 4K doesn't work tho, so if you want that, get a newer model. I don't think they even sell the 2B anymore because it's so old.
Are dedicated media-centered OSs (fast boot, remote control) available?
Yes, I'm using libreelec, I and friends control the display from our phones using the Kore app. Makes searching and typing easy, works great on my Pi. Fun game, which of you will select a movie first on your phones lol.
Note: pi3B can do 1080p but it struggles a little if the codec is anything other than h264, because Kodi decided to stop supporting closed source drivers. If you're playing anything above 1080 and anything other than h264, go for a pi 4 or better.