Plex refugee considering Jellyfin

[FilmAuthority]

So Plex is just getting more and more unstable and unreliable (and now more expensive) and I have heard good things about this platform so I just thought I'd ask some questions from folks already using it.
1. How forgiving is it if you have a double NAT situation? Where I'm renting the landlord has control of the internet so there's nothing I can do about this.
2. People who have crossed over from Plex, how does it compare? I mean in terms of stability and remote access for multiple people.
3. Does it have any problems with large amounts of films or 4k playback? My collection currently stands at 3515 films, a good deal of which are 4k, and I was wondering if this would pose a problem?

Apologies in advance for any stupid questions.
Let me know if there's other things I should be aware of before making the switch.

[alleycat]

So Plex is just getting more and more unstable and unreliable (and now more expensive) and I have heard good things about this platform so I just thought I'd ask some questions from folks already using it.
1. How forgiving is it if you have a double NAT situation? Where I'm renting the landlord has control of the internet so there's nothing I can do about this.
2. People who have crossed over from Plex, how does it compare? I mean in terms of stability and remote access for multiple people.
3. Does it have any problems with large amounts of films or 4k playback? My collection currently stands at 3515 films, a good deal of which are 4k, and I was wondering if this would pose a problem?

Apologies in advance for any stupid questions.
Let me know if there's other things I should be aware of before making the switch.

1. Can't answer
2. Never used Plex

3. You may indeed have to rename most of your movie collection so they will work with Jellyfin. That is if you didn't rip/backup your discs yourself and "downloaded" your movies from the internet.

 https://jellyfin.org/docs/general/server/media/movies

.

[Rastin]

Your biggest issue will be your landlord control over the router. You can run both at the same time so install jellyfin and try it and see if its for you. The size of you movies will not cause any problem that i know of.

[FilmAuthority]

So Plex is just getting more and more unstable and unreliable (and now more expensive) and I have heard good things about this platform so I just thought I'd ask some questions from folks already using it.
1. How forgiving is it if you have a double NAT situation? Where I'm renting the landlord has control of the internet so there's nothing I can do about this.
2. People who have crossed over from Plex, how does it compare? I mean in terms of stability and remote access for multiple people.
3. Does it have any problems with large amounts of films or 4k playback? My collection currently stands at 3515 films, a good deal of which are 4k, and I was wondering if this would pose a problem?

Apologies in advance for any stupid questions.
Let me know if there's other things I should be aware of before making the switch.

1. Can't answer
2. Never used Plex

3. You may indeed have to rename most of your movie collection so they will work with Jellyfin. That is if you didn't rip/backup your discs yourself and "downloaded" your movies from the internet.

 https://jellyfin.org/docs/general/server/media/movies

.

Thanks for the reply! Okay that works out nicely as that's already how I keep my ''downloaded'' films organized.

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Your biggest issue will be your landlord control over the router. You can run both at the same time so install jellyfin and try it and see if its for you. The size of you movies will not cause any problem that i know of.

the below is from chat gpt an ai


1. Double NAT (landlord router) — how forgiving is Jellyfin?

Short answer: not very forgiving by default.

Unlike Plex, Jellyfin does not have relay servers or NAT traversal. Remote access normally requires one of these:

port forwarding on the router

reverse proxy (nginx/Caddy)

VPN (WireGuard, Tailscale, etc.)

Plex works more easily behind tricky networks because it can route traffic through its own servers, which hides NAT issues.

In a double NAT situation

You can’t port-forward, so typical Jellyfin setup fails.

But there are three common workarounds people use:

1️⃣ Tailscale / WireGuard (most common)

server joins VPN

your friends/family connect to the VPN

Jellyfin works as if they’re on your LAN

2️⃣ Cloudflare Tunnel

outbound connection from your server

bypasses NAT entirely

3️⃣ VPS reverse proxy

your server connects to a VPS

VPS exposes the public endpoint

👉 Bottom line:

Plex: works automatically in double NAT

Jellyfin: needs one of the above tricks

Thanks. Please don't ever reply to me using something that came from an LLM. Case in point is that I currently use Plex and it does NOT automatically work with double NAT; it took a lot to get it working. So I'm sure that everything else in this post is also wrong.