Originally Posted by Foxbat121
In order to play them in standalone BD players, you need first convert wtv file into a conventional video file then use proper software to author the disc into a BD movie disc.
You could use a program like Handbrake to convert the .wtv files to .m4v or .mkv files, then burn those files onto a disk to play in a standalone BD player. However, YMMV as to whether this disk is playable on different machines - I did this to some 720p HD .wtv files; they played fine on my standalone BD player, but had a 4 to 5 second audio lag when played in another BD player.
If this does work for you...I imagine you could easily get the 5 GB .wtv files compressed down to about 1 GB per hour as .m4v or .mkv files - you could get about 20 hours or so on a BD disk then. (25 GB BD-R actually holds around 23 GiB - you know, the whole "gigabyte vs. gibibyte" thing.)