|Well there could be several problems. It could be the software you were using to create the disc could not transcode the MP4 and FLV files into the standard MPG2 DVD format. it could also be that you told the program to burn a DVD but you used a CD instead and it confused the program causing it to write who knows what on the disc.|
So here's what you have to decide, do you want to create a CD with the video's on it or do you want to create a DVD with videos on it.
First, I would suggest getting a program that will trans-code the files into the format you need to use. It will be MPEG1 for VCD or MPEG2 for DVD. Super video encoder is great for doing this and it's free.
You can also look at the manual for your DVD player. Some players can play video files straight from a disc without any special formatting. If yours can, determine what format it can play, then use Super to convert the files into that format and you can burn those straight to a disc without doing this next step.
Next, trans-code the video into the format you plan to use, then make sure it plays on your computer. Windows media player will play both formats so if it plays them after converting, your half way there. Then I would suggest downloading the proper software to create a VCD or video DVD. Do not just use software that burns to DVD as it will not create the proper files structure on the disc.