Viewst is my first HTML5 creator and it is very easy to understand and to create amazing banners and content with. Viewst is in my view mainly a HTML5 banner creator, and not a video content creator, although you can export the banners as videos (files) and GIFs.

If you have some experience with designing graphics (composition mainly of elements, texts and colors) and some video editing experience, Viewst is very easy to learn.

Plus:
+ Easy to learn
+ Fast platform, no or limited buffering when editing
+ Most basic editing and animation possibilities are there
+ Responsive customer service on chat
+ Public roadmap
+ Unlimited projects and HTML5 exports
+ Unlimited teams.

Minus:
- Some bugs, but they seem to be sorted if you inform Viewst
- A bit of limited editing and animation features, but seems to come more eventually
- Available illustrations for use in Viewst are too few at the moment.

I recommend this tool for anyone who wants to produce great HTML5 banners quickly, this lifetime deal is great for the pricing, and therefore my rating.