about the last one, everything is usually FFmpeg
Unlike centralized social media your videos aren't automatically optimized on Nostr. Here are some good tools to compress your videos for smaller size and better streaming before upload.
"Make sure to make it web optimized and no more than 720p. Or even 480p is great for a long news like segments 🐶🐾🫂🫡💜"
🔹Android
Light Compressor enhanced
https://github.com/davotoula/LightCompressor-enhanced
Proton - Google Play Store
https://play.google.com/store/apps/details?id=com.arthur.hritik.proton.video.compressor
🔹iOS
https://testflight.apple.com/join/qgkAMPgU
🔹Desktop - available for Linux, Mac & Windows
Handbrake
Handbrake looks complicated, but there are presets available. Under General, Fast 720p30 & Fast 480p30 will be good options. I would also enable the Web Optimized option for better streaming.
FFmpeg
If you are comfortable with the terminal FFmpeg is a best in class option. LLM's are useful to formulate your commands.
Discussion
Yes, this is true. Not the friendliest for most people though. I still use it sometimes when the task is obscure. That and imagemagick are great tools.
#amethyst video compression and LCe aren't just wrappers around ffmpeg. Instead they use native, hardware accelerated android libraries.