Flowblade Movie Editor

Flowblade Movie Editor is a free and open-source multitrack non-linear video editor for Linux. It provides a comprehensive set of tools for editing, compositing, mixing, and filtering video and audio, supporting a wide range of media formats and codecs.

Flowblade is a multitrack non-linear video editor that supports various editing tools, compositing, mixing, and filtering. It explicitly mentions multi-track video and audio, which aligns with multi-source recording. It also offers a wide array of basic editing tools (trim, cut, move), scene transitions (wipes, blends, fades), audio enhancements (volume, pan, various audio filters), and branding/overlays (watermarks, titler for text layers). Keyboard shortcut support is also explicitly mentioned. However, it does not appear to have automatic cursor tracking, dynamic zoom, or automatic subtitle generation, which are must-have features for FocuSee.