About a year I dig into the mentioned OpenShot program. Right into the code... (later I was blocked from the source, so, please, look at this post with scepsis). And you know, without any changes and custom made builds it is not suitable for editing (even for small 5-minutes videos). You need to heavily customize it, fix some critical bugs and only then use it.
As for 10/2020 OpenShot cannot scale chroma planes right (low resolution "stairs" artifacts). It fails to convert colors right (PNG images, BT709/601 messed up etc. To be honest, I made fix for this, but it was rejected because dev wasn't ready and didn't knew this part of the FFmpeg...). And even then it is very simple and a bit slow editor. At least, it supports bilinear scaling algorithm. Effects are hard to apply and manage if they are not full screen effects. Animation control is terrible (better to not move anything on the screen or animate parameters because it's very hard to get good result - most of the edits will be made blind and position/time inaccurate). Transitions is not so bad as for free editor, nothing with alpha or 3D transformations but simple fade-in/out by luma are present. Fast-forward is possible with some cautions (as soon as video fragment was fast-forwarded do not try to modify it!). Editor is known for sync issues, project file damages, crashes (a lot). Other minor issues are not destructive, thus can be ignored.
For me, as customer, current OpenShot project state looks frozen. Code changes... but these changes are mostly cosmetic (ether build fixes or code cleanup). It is single person project and the quality control is behind the wall of the developer's own opinion. Sometimes I think that developers are never do (or ever did) the job the program intended for. It works somehow but is like a hammer when you need scissors (just scissors and glue). This year the dev of the OpenShot said few times about new UI for the program and this means that all bugs will stay in place ^_^ (cross fingers).
