Download OBS https://obsproject.com/download
Choice your version windows 32 or 64 bits.
After installed - setup OBS for good quality record 3-5min video and check result.
Priority of CPU better to hign (if slow CPU)
Bitrate to 3000 for midle quality (1000 = bad quality)
For any record better CPU with 4 or more phisical CORE, because MOH use 1.5 CORE
If when you record game - you have lags, try record 15fps (30 FPS is normal)
Other good program bandicam, but not cracked version recording 10min and do autopause, for continue record - press key ingame.
If you save video to fisk FAT-32 then max size of part of video =4gb. For summary all parts of video to one film - use Youtube editor