dear friends I watch zoom webinars and record it with OBS It was stored good in my laptop and I can play it again many times Then I tought to save it in my external drive So I copy it and paste it Then I delete the MKV in my laptop I have done this for several zoom recordings One day I like to play it from my external drive and I can not open it So I am now disappointed what to do Is there an expert that could help? I will pay for the service please help me I gave my email dhana.sby@gmail.com, my Whats app number +62 882 1785 3829 and my cell +62 881 311 5085 I can send an example of the MKV file that I can not open thanks to all regards SURYA