My dvd player is only a cheap player & can play more than many 3 or 4 times the price. It cost me $109 AUD which is equivalent to $81 US or 46.2 British Pound.

You say 70 MB. Are you sure they were 70 MB or 700 MB? If they were 700 MB then perhaps you did just burn as data dvd & your player played them as mpeg4/divx videos. If they were 70 MB then I don't know. It could have been either. After all, 4 x 70 MB is only 280 MB which is about one 15th of what can fit onto a dvd. If these were only short videos then if they were converted to mpeg 2 video for a proper dvd-video disk then they would be able to fit also.