请问or后缀名的视频文件用什么能播放，谢谢，在线等，急

首先，这不是视频文件。你要是实在想打开的话需要它的完整文件后缀，当然，也可以试着下个格式转换器转换成视频文件，或者直接改后缀名，改之前一定要备份，有可能改了就改不回来了。
这是参考表：
OR2 Organizer Ver 2 File (IBM)
OR3 Organizer 97 File (IBM)
OR4 Organizer (IBM)
OR5 Organizer (IBM)
OR6 Organizer Data File (IBM)
OR8 Rational Rose Oracle8 Database Model Report (IBM)
ORA Oracle 7 Configuration
ORC cSound Synthesis Instruments (Csounders)
ORC Oracle 7 Script
ORC Digital Orchestrator Plus Sound File (Voyetra Turtle Beach， Inc.)
ORD BC45 Owl File
ORD OMAX Make Tool Path File (OMAX Corporation)
ORE 3WayPack (The Three-Mode Company)
ORF Descent 3 Outrage Room Format
ORF Olympus Digital Camera Raw Image File
ORG Organiser (IBM)
ORG Microcal Origin Plot
ORG Netmino File
ORG Origin File
ORG Hollywood FX Effects Organizer File (Pinnacle Systems， Inc.)
ORI Need for Speed-Hot Pursuit 2 File
ORI Original
ORIG Gen Original File
ORIGINAL Netobjects Fusion Components BBScomp Message File
ORO 3WayPack (The Three-Mode Company)

好像没有这个格式的视频文件,你把扩展名该成MP4试试