When it comes to VR video formats, the most commonly used formats are MP4 (MPEG-4) and MKV (Matroska Video). These formats are widely supported and compatible with various VR platforms and devices. Many VR videos can be found in these formats, including content available on platforms like YouTube VR and Facebook 360. You can also watch 4K 360 video online with flash video format like FLV, WebM, MPEG, etc.

MP4 and MKV are versatile video container formats that can store not only the video but also audio, subtitles, and other multimedia elements. They provide efficient compression while maintaining high-quality playback, making them suitable for VR content distribution. These formats are often used for both 360-degree videos and traditional non-360 videos that are optimized for VR viewing.

Other video formats that can be used for VR experiences include Flash Video (FLV), WebM, and MPEG formats which are commonly employed for online streaming of 4K 360-degree videos. These formats offer different compression algorithms and playback capabilities, allowing users to enjoy immersive VR content in high resolutions.

It’s worth noting that the compatibility of video formats may vary depending on the specific VR platform, software, or device being used. It’s always advisable to check the recommended video format and specifications provided by the target VR platform or device to ensure optimal playback and compatibility.

Note: It’s important to keep in mind that VR video formats can vary depending on the platform, device, and specific requirements. The formats mentioned in the answer are commonly used but may not cover all possible VR video formats.