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Strange that your TV can play these large files. Do you really play from an USB Flash Drive (Memory Stick)?
Mine stops after 102 minutes (1.265 Gb).

Here is the answer from Phillips Support,...

Dear knl, did this solve your problem. As I know, this Phillips cannot play videos to the end from USB Flash if the file (ex. .mk4) is bigger than 1.265 Gb.

I think you have to split the files...