I’d recommend using Make MKV if possible, and then you might use Handbrake to transcode it.
I think it’s important to remember de difference between being private and being anonymous. Signal IS private. It’s not anonymous. The same is true for many other apps/services.
Personally I like to be private. I don’t really need to be anonymous.
I think it was about year 2000 +/- I was about 23 yrs old… I’ve tried a most of the big distros, and was using Ubuntu for the longest time. Now it’s Mint I use…