Kaltura Player VS MediaElement.js

Fastest, Most Flexible Online Video Player Toolkit

MediaElement.js provides HTML5 audio and video players in pure HTML and CSS.

Customization
Kaltura Player offers extensive customization options, allowing developers to tailor the player to meet specific branding and functional requirements.
Responsive Design
The player is designed to be fully responsive, providing optimal viewing experiences across a wide range of devices and screen sizes.
Broad Format Support
Kaltura Player supports a wide variety of video and audio formats, ensuring compatibility with most media content.
Robust API
The player comes with a robust API that enables deep integration with other systems and platforms, providing developers with flexibility and control.
Accessibility Features
Kaltura Player incorporates essential accessibility features such as captions and keyboard navigation, meeting compliance standards like WCAG and ADA.

Complexity
Setting up and customizing Kaltura Player can be complex, and may require a steep learning curve for developers unfamiliar with its architecture.
Performance
In some cases, the player might exhibit performance issues, especially when loaded with many customizations or operating on low-power devices.
Documentation Depth
While Kaltura Player documentation is available, some users find it insufficiently detailed for more advanced use cases, potentially requiring additional support.
Cost
For advanced features and enterprise-level usage, Kaltura Player may entail costs that could be prohibitive for smaller organizations or projects.

Cross-browser compatibility
MediaElement.js is designed to work across all major web browsers, providing a consistent media experience regardless of the user's browser.
HTML5 and Flash support
It supports both HTML5 and Flash, ensuring media plays even on older browsers that do not support HTML5.
Customizable
It offers various options for customization, allowing developers to tailor the media player to fit the design and functionality needs of their website.
Accessibility
The player is designed with accessibility in mind, featuring support for screen readers and keyboard navigation.
Extensible
It supports plugins, making it easier for developers to extend functionality as needed.
Playlist support
It has built-in support for playlists, making it easier to manage and play a sequence of media files.
Consistent API
Provides a consistent API for media playback, which simplifies the process of media integration for developers.

Dependency on Flash
While it provides fallback to Flash, this can be seen as a downside since Flash is becoming obsolete and presents security vulnerabilities.
Performance
Depending on the complexity and number of media elements, performance can be an issue, especially on resource-constrained devices.
Size
The library can be relatively large compared to other media players, which can affect load times and overall performance of web applications.
Complexity
Though customizable, the process can be complex for developers who are not familiar with JavaScript and the library's configuration options.
Limited advanced features
While it covers basic needs well, it may not have advanced features out-of-the-box that other specialized media players provide.