I had the same issue this that site. I think it is caused by ad block. I browse the internet with Firefox that have ad blocking addons installed, but always have Chrome installed without any adddons to test sites just in case. And on chrome it worked OK.

I would love to be 100% sure about this. I did this few years back. I know I searched on the internet on how the dat file should look like and came across that AMule uses these files. And explanation for all these fields can be found here.

That documentation is short but to quote the most relevant part:

IPs range , Access level , Description
Access level values lower than 127' are blocked IPs and values over 127 are allowed IPs. 

The thing is I don't know if this is a some kind of standard or not and I don't know if qBittorrent needs (and respects) those two other fields. Maybe it even ignores them, because why would an IP range would be in IP blocklist if not to block it? However, at that time I could only find that information, it did make my work any harder, it seemed to work, so I did not try to create and use a filter without them.

I misread your post. I looked into my script and I actually used ip2location as a source for IP ranges. However, I can't seem to find a way to download them (at least without an account) in csv file. Most likely they changed that. Or maybe I just copied them from the page by hand (pro tip just mark first cell, then go down to the end of the table and while holding SHIFT mark the last one).

I can find where I found it, because that was first and last time I dealt with *.dat files, but I script makes line look like this:

1.0.1.0 - 1.0.3.255 , 000 , china ban ip range from ip2location

with spaces and all.

It seems to work. If anyone wants a China ban list or the script, let my know with reply.

I don't know how much extra memory my qBittorrent uses with that list (718 ranges/lines), but as a reference with 1427 torrents it uses ~8GB of RAM.

Pihole does not block YouTube adds.

But that's the literal point of WebUI of any program. To make it possible to connect and manage the program from any device from the remote machine. And there is a reason why most developers choose to use WebUI - you don't have to create multiple cleants for every OS and every internet connected device has a web browser. In fact web browser can be considered the client in this scenario.

What could be the reason why anyone could be against WebUI? I can only think of one advantage of native client that has to be installed is that it would make of possible to associate torrent files and magnet links with it.

And lastly, if you would search for qbittorent remote client most likely in top 5 results you would find electorrent. I haven't tried it but at least description claims that it can be used with qBittorrent.

Edit: heh it seems I managed to reply to my own comment.

Again, I haven't tried it, but most likely those moded apks re-enable ability to clear the data.

Have you checked in mobilism? I searched for it and found some releases and bunch of (paid?) skins for it? I never used it and heard about it just from your post, but from what I gathered from releases on mobilism that even modded versions are trial ones and you have to clear app data every 15 days to reset the trial. The catch is that app has backup/restore function that does not work on modded versions for some reason.

On not that related note. mobilism policy is quite strange. It seems they allow some "trial" versions but not others. I managed to crack an app that had only a trial version, that work for 24h and then would locks the UI and asks user to buy a pro version. You could clear the app data and use trial version for another 24h, but every time you would have to go through short setup that becomes tedious fast. I simply removed that time check and in my opinion for all intent and purposes it became a pro version. They removed the app for being a trial version.

I haven't seen a YouTube video without a separate audio track. If you use yt-dlp just add -F and the URL to get all available download options/formats. Then use -f and the number of the download option and URL to download the video/audio. Audio on YouTube is available in two formats most of the time: opus and m4a.

I used it on Ubuntu server, because I wanted to cross share my torrents on that network just to keep it alive, however it had a memory leak and would eat all of 32GB of RAM in couple of days. Had to give it up. I even tried to compile it myself, because I read somewhere that one of the libraries caused the issue, but it didn't solve it for me. It's a shame it's not in active development anymore.