Make meta/info.json compatible with gr00t finetune script

gr00t finetune script expects either "info/video.channels" field or a "video_info" field. Adding

meta/info.json

@@ -94,6 +94,7 @@
                 "video.codec": "avc1",
                 "video.pix_fmt": "yuv420p",
                 "video.is_depth_map": false,
+                "video.channels": 3,
                 "has_audio": false
             }
         },
@@ -114,6 +115,7 @@
                 "video.codec": "avc1",
                 "video.pix_fmt": "yuv420p",
                 "video.is_depth_map": false,
+                "video.channels": 3,  
                 "has_audio": false
             }
         }