vegas 14

I've found that vegas 14 lags when handling HEVC /h.265 files from my p4a, but it's fine with h.264 files regardless of mp4 or mov formats. If I were to convert my h.265 footage for easier editing, what's a recommended converter? I'd still be looking to color correct my footage though. For the...

I have a mixture of Yi 4k+ video files and P4A scenes all shot in 4K, but only the Yi files show playable previews on the timeline. Why is that?