I used to be a video firmware engineer working on real-time MPEG2 systems. That was a long time ago though. Today I primarily work on video from a DJI Mavic Air 2, a few GoPros, and an Insta360 One X2. Many times I need a few hacks to do what I want. Here are some that I use most often.
Combine multiple MP4 videos into oneExtracting video from a Cloud Key running Ubiquiti protect