In tools like Adobe Premiere Pro or DaVinci Resolve , ensure your "Color Space" is set to Rec. 601 for SD timelines.
For advanced users, FFmpeg can force the color tags during conversion: ffmpeg -i input.mov -vf "colorspace=all=bt601-6-625:itype=interlaced" -c:v libx264 -pix_fmt yuv420p output.mp4 2. File Naming: "601.mp4" 601 mp4
Are you trying to a video with specific color settings, or are you trying to repair/open a file that has "601" in the name? In tools like Adobe Premiere Pro or DaVinci