I've been using Avidemux for years now and I think it's one of the best video editors / converters out there
I'm about to get a new PC with an Intel CPU that has Quicksync enabled
Does Avidemux support Quicksync? I haven't been able to find a clear answer anywhere
On Linux and macOS: yes (known as VA-API and VideoToolbox respectively). On Windows only decoding is hw accelerated (DXVA2).