Hi there. I'm having issues with Bandicam HEVC files not opening with Magix Vegas.
Magix Vegas definitely does support HEVC files since I believe 14.0. They are now on 15.0 and files still work fine.
Mirillis Action!'s HEVC video files open perfectly on Vegas with no issues.
It seems that both of your products are missing something that I want. For Action, they're missing bitrate features. For Bandicam, you're missing HEVC compatibility with Magix Vegas.
Please let me know if this issue is being worked on. Should Action! update their bitrate selector, I'll be purchasing with them!
Edit: Action! also has a replay buffer feature that has been a requested feature for bandicam since 2012. 5 years later I guess Bandicam couldn't pull through with that request, so I don't have much hope on this issue.