The problem here is that you can't just dump multiple videos onto a DVD and expect them to play on a regular DVD player.
You have to author them into the actual DVD format. (Taking multiple videos ripped from DVDs and putting them together does not equal having all things authored in DVD format.) So what I suggest you do is:
Demux those ripped videos into their respective video and audio components using any demuxing tool. (I use bbdmux.exe.) You should have 2 files (a .m2a for audio and .m2v for video) for every music video.
Get the trial version of TMPGEnc DVD Author and put those demuxed files into your project.
In TMPGEnc DVD Author, create your DVD menus (if you want any) and then follow the wizard onward and your DVD will be authored. This will create a new VIDEO_TS directory with all menus, videos, etc, created together.
3 and 1/2. (optional but recommended step) Open the new VIDEO_TS directory in PowerDVD and it should load as a normal DVD, except that it plays from your hard drive. (This step is for test/verification purposes only!)
- Start a new DVD Video compilation in Nero and drag the files from the new VIDEO_TS directory into it.
4 and 1/2. (optional but recommended step) Burn using the Image File burner as opposed to an actual disc. And then mount the resulting .nrg using Nero DriveImage and you can test it as if you had actually burned it to a real DVDR. You can load this into PowerDVD for testing purposes. And when you are satisified with what you have created, then burn it for real!
- Burn to DVDR!