Honestly nothing needs to be pirated really, you can find some great stuff on YouTube. Many of the programs are all the same stuff in different wrappings, so find a program you like and go for it.
For weight training, check out MidasMVMT (videos on YouTube, full programs on his website, all free).
For yoga/pilates, you may like Ashley Freeman and Saturno Movement.
If you want to keep them for your local media server, yt-dlp and off to the races. You'll also find some weightlifting, cardio, and general fitness communities here on Lemmy with great information as well.