Trying to make user background videos for a karaoke player, help needed.

[JoshBayasca]

Trying to make my own BGVs for one of my own SD card karaoke players, specifically my HDT Premier-98sd.
Tried to convert a video to the intended parameters using ShanaEncoder and put it to my player as BGV, but it led to an error - while a song is playing and my own BGV repeats, the video skips a lot.

These are the properties of one of the built-in BGVs, according to MediaInfo:

General
Complete name                            : C:\Users\USERNAME\Videos\VIDEOD-01.mpg
Format                                   : MPEG Video
Format version                           : Version 2
File size                                : 502 MiB
Duration                                 : 13 min 57 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 5 029 kb/s
Frame rate                               : 29.970 FPS
FileExtension_Invalid                    : mpgv mpv mp1v m1v mp2v m2v

Video
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Default
Format settings, GOP                     : M=3, N=15
Duration                                 : 13 min 57 s
Bit rate mode                            : Variable
Bit rate                                 : 5 029 kb/s
Maximum bit rate                         : 7 000 kb/s
Width                                    : 720 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate                               : 29.970 (30000/1001) FPS
Standard                                 : NTSC
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.486
Time code of first frame                 : 00:00:00;00
GOP, Open/Closed                         : Open
GOP, Open/Closed of first frame          : Closed
Stream size                              : 502 MiB (100%)

What can I do to make my own BGVs work properly? What are the recommended tools to use? Freeware software is preferred.