Welcome to the Forum.
There are a couple of reasons why you could be experiencing your problem. Unfortunately you have not provided enough sufficient information for Forum Members to provide a definitive corrective answer to correct your problem.
What are the Manufacture Name and Model Number of your DVD Player Playback devices?
What are the Manufacture Name and Model Number of the DVD devices that you are using to record the â€œburnt dvd moviesâ€?
What is the Name and Version Number of the recording software program you are using to record your â€œburnt dvd moviesâ€?
Provide the complete full-untruncated Error Native and/or Error Codes you are receiving when the â€œburnt dvd moviesâ€ fail to play/view.
Provide the Media MID (Manufacture ID and Media Code) (Example: TYG02) of the Media you are using to record your â€œburnt dvd moviesâ€. To obtain the Media MID (Manufacture ID and Media Code) (Example: TYG02) suggest using a utility software program similar to N e r o CD DVD Speed (http://www.cdspeed2000.com/files/NeroCDSpeed_47716.zip) and/or DVDInfo (http://www.dvdinfopro.com).
Provide detailed information on exactly what these â€œ.avi movie formatsâ€ are and the exact procedure you use to record these â€œ.avi movie formatsâ€ to DVD Media.