General structure
1. HTML structure
The application has a modular structure with three main sections:

Player (left block) - contains video, basic controls and export settings

Editor (right block) - contains a toolbar for editing with three tabs

Modal window for the export process

2. Styles (CSS)
Using modern CSS technologies:

CSS variables for the color scheme

Flexbox and Grid for adaptive layout

Gradients, shadows, transparency effects

Pseudo-elements for decorative elements

Animations and transitions

Media queries for adaptability

Styles for fullscreen mode

3. JavaScript functionality
The application provides the following functionality:

Main features
Video playback:
Uploading video files (all video formats are supported)

Playback control (play/pause)

Volume control

Full-screen mode

Fast-forward progress bar

Keyboard shortcuts

Basic editing Settings:
Brightness (-100% to +100%)

Contrast ratio (-100% to +100%)

Saturation (-100% to +100%)

Shade (0-100%)

Playback speed (0.25x, 0.5x, 1x, 1.5x, 2x)

Filters (25+ presets):
Basic: B/W, Sepia, Inversion, Blur

Artistic: Vintage, Cold, Warm, Dramatic, Cinema

Stylized: Noir, Retro, VHS, Cyberpunk, Pastel

Instagram style: Lomo, X-Pro, Willow, Walden, Valencia, etc.

Visual Effects (14+ effects):
The vignette

Noise

Pixelation

Glitch

The glow

Chromatic aberration

Film grain

Mirror

Old movies

Neon and others.

Export:
Export to different formats (MP4, WebM, AVI)

Different quality levels (high, medium, low)

Screenshot

The export process with a progress bar

Additional functions:
Status bar with current settings

Preview when rewinding

Keyboard shortcuts for quick control

Responsive design for mobile devices

Reset all settings

File dragging support

Technical features
Video Processing:
HTML5 Video API is used

CSS filters for visual effects

Canvas for exporting and screenshots

URL objects for working with video files

Architecture:
Modular code structure

Centralized status management

Event-oriented architecture

Asynchronous export processing

UI/UX features:
Modern neon design

Smooth animations and transitions

Intuitive interface

Visual feedback

Hints and status messages

Implementation features
Performance: CSS filters are used for smooth application of effects.

Security: Secure methods of working with files are used

Cross-browser compatibility: Supports all modern browsers

Adaptability: Full support for mobile devices

Accessibility: The basic principles of accessibility are taken into account

It is a full-featured web client application that does not require a server part and runs entirely in the browser, using the capabilities of modern web technologies.