Hello! I've been lurking the forums all day trying to take in as much info as possible, and I've been messing with Hybrid with great success, though the program is daunting with the sheer amount of options it has.

Sample source is an old PAL TV recording recorded using a period accurate video recorder that recorded to mpeg-2 at 720x576 @ ~9k bitrate and its only input option is RCA ().

Code:
General
Complete name                  : D:\VideoTest\Medallas\20120811_2319_Medallas_Fem.mpg
Format                         : MPEG-PS
File size                      : 471 MiB
Duration                       : 7 min 5 s
Overall bit rate mode          : Variable
Overall bit rate               : 9 271 kb/s
Frame rate                     : 25.000 FPS

Video
ID                             : 224 (0xE0)
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=12
Format settings, picture struc : Frame
Duration                       : 7 min 5 s
Bit rate mode                  : Variable
Bit rate                       : 8 830 kb/s
Maximum bit rate               : 9 800 kb/s
Width                          : 720 pixels
Height                         : 576 pixels
Display aspect ratio           : 4:3
Frame rate                     : 25.000 FPS
Standard                       : PAL
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Interlaced
Scan order                     : Top Field First
Compression mode               : Lossy
Bits/(Pixel*Frame)             : 0.852
Time code of first frame       : 00:00:00:00
Time code source               : Group of pictures header
GOP, Open/Closed               : Open
GOP, Open/Closed of first fram : Closed
Stream size                    : 448 MiB (95%)
Color primaries                : BT.601 PAL
Transfer characteristics       : BT.470 System B/G
Matrix coefficients            : BT.470 System B/G

Audio
ID                             : 192 (0xC0)
Format                         : MPEG Audio
Format version                 : Version 1
Format profile                 : Layer 2
Duration                       : 7 min 5 s
Bit rate mode                  : Constant
Bit rate                       : 256 kb/s
Channel(s)                     : 2 channels
Sampling rate                  : 48.0 kHz
Frame rate                     : 41.667 FPS (1152 SPF)
Compression mode               : Lossy
Delay relative to video        : -17 ms
Stream size                    : 13.0 MiB (3%)

Menu
Format                         : DVD-Video
So far I've been using x264 and NVenc (to see what was faster but it's about the same, 60fps), cropping black bars, upscaling to 1080p and using QTGMC and Vapoursynth to deinterlace and apply some filters and the quality improvement is noticeable.

I didn't want to alter the source, datacap users we warned:
Original file (470 MB): https://www.mediafire.com/file/ptztxw1bo0a4tkc/20120811_2319_Medallas_Fem.mpg/file

Output (220 MB): https://www.mediafire.com/file/ptvstxjeb5h7dpv/20120811_2319_Medallas_Fem_hybrid_GPU-n...arpen.mp4/file

Settings used! If not in the screenshot, it's the default.

Do you think I can improve it in any way? There are thousands of possible combinations between the different filters, without counting all the individual options and I don't even know where to start.

BTW I'm not using Filtering - Vapoursynth - Frame - Resize - NNEDI3 as Selur recommended in some post because I saw no gain in quality taking x6 time to complete.

Thanks for your help!!