Pretty good, but can improve

Fantastic app and Id recommend this to everyone out there, but I think you should add a couple key features.
An audio track editor, which could be used to edit from a source video or other audio sources.
Audio imported from YouTube, for example, being used from six seconds to the tenth and final second in a full length coub after the source audio for the initial five seconds. With this theory, assembling ready-to-publish coub drafts, or trimmed video segments with audio tracks saved to these drafts, would drastically improve output quality and I believe youd see many more people flocking towards this service in droves.
I know theres enough complaints about upload speed and all, but with a service to offer as many features (possibly including the suggested?) I dont see how the cons could outweigh the pros here.

In all, Id pay a buck for ad free version or whatever if youre looking to gain revenue in which a marginal percentage would go towards product improvement.

Killroi99 about Coub, v1.14.1