I will add the re-encoded sample SD DV file using ffmpeg SVT-AV1, as I was positive surprised how much faster (preset 10 about 25 sec) it was than rendering AV1 with CinGG (libaom?) .  I've tested three presets: 8, 10 and 12. "Useable visible quality" for all.

    ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 8 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr8.webm
    frame= 2832 fps= 66 q=35.0 Lsize=   28836kB time=00:01:53.26 bitrate=2085.6kbits/s speed=2.65x    

    ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr10.webm
    frame= 2832 fps=112 q=35.0 Lsize=   34419kB time=00:01:53.26 bitrate=2489.4kbits/s speed=4.47x   

    ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 12 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr12.webm
    frame= 2832 fps=262 q=35.0 Lsize=   35913kB time=00:01:53.26 bitrate=2597.5kbits/s speed=10.5x   

2.0G    hdv01_04.m2t
383M    hdv01_04_m2t_svt-av1_pr10.webm

1.7G    hd01.mov
20M     hd01_mov_svt-av1_pr10.webm

ffprobe -hide_banner hdv01_04.m2t
[mpeg2video @ 0x560c32966340] Invalid frame dimensions 0x0.
    Last message repeated 7 times
[mpegts @ 0x560c32960c00] PES packet size mismatch
[mpegts @ 0x560c32960c00] Packet corrupt (stream = 1, dts = 295380000).
[mpegts @ 0x560c32960c00] Could not find codec parameters for stream 2 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[mpegts @ 0x560c32960c00] Could not find codec parameters for stream 3 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpegts, from 'hdv01_04.m2t':
  Duration: 00:10:57.34, start: 2624.856000, bitrate: 26134 kb/s
  Program 100
  Stream #0:0[0x810]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 90k tbn
    Side data:
      cpb: bitrate max/min/avg: 25000000/0/0 buffer size: 7340032 vbv_delay: N/A
  Stream #0:1[0x814]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s
  Stream #0:2[0x815]: Unknown: none ([160][0][0][0] / 0x00A0)
  Stream #0:3[0x811]: Unknown: none ([161][0][0][0] / 0x00A1)
Unsupported codec with id 0 for input stream 2
Unsupported codec with id 0 for input stream 3
--------------

ffmpeg -i hdv01_04.m2t -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hdv01_04_m2t_svt-av1_pr10.webm
frame=16420 fps= 69 q=34.0 Lsize=  391289kB time=00:10:57.36 bitrate=4876.2kbits/s speed=2.77x   

ffprobe -hide_banner hdv01_04_m2t_svt-av1_pr10.webm
[libdav1d @ 0x562b42305540] libdav1d 1.3.0
Input #0, matroska,webm, from 'hdv01_04_m2t_svt-av1_pr10.webm':
  Metadata:
    ENCODER         : Lavf60.3.100
  Duration: 00:10:57.40, start: 0.000000, bitrate: 4875 kb/s
  Stream #0:0: Video: av1 (Main), yuv420p(tv, bt709), 1440x1080, SAR 4:3 DAR 16:9, 25 fps, 25 tbr, 1k tbn
    Metadata:
      ENCODER         : Lavc60.3.100 libsvtav1
      DURATION        : 00:10:57.403000000
  Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp
    Metadata:
      ENCODER         : Lavc60.3.100 libvorbis
      DURATION        : 00:10:57.171000000
[libdav1d @ 0x562b42361540] libdav1d 1.3.0

ffprobe hd01.mov
.....
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hd01.mov':
  Metadata:
    creation_time   : 2016-02-23T23:49:21.000000Z
  Duration: 00:01:11.28, start: 0.000000, bitrate: 200496 kb/s
  Stream #0:0[0x1](eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(bt709, top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : Apple ProRes 422 (HQ)
  Stream #0:1[0x2](eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32 (24 bit), 18432 kb/s (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]

ffmpeg -i hd01.mov -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hd01_mov_svt-av1_pr10.webm
frame= 1781 fps= 51 q=35.0 Lsize=   19732kB time=00:01:11.26 bitrate=2268.3kbits/s speed=2.03x    

ffprobe -hide_banner hdv01_04_m2t_svt-av1_pr10.webm
[libdav1d @ 0x562b42305540] libdav1d 1.3.0
Input #0, matroska,webm, from 'hdv01_04_m2t_svt-av1_pr10.webm':
  Metadata:
    ENCODER         : Lavf60.3.100
  Duration: 00:10:57.40, start: 0.000000, bitrate: 4875 kb/s
  Stream #0:0: Video: av1 (Main), yuv420p(tv, bt709), 1440x1080, SAR 4:3 DAR 16:9, 25 fps, 25 tbr, 1k tbn
    Metadata:
      ENCODER         : Lavc60.3.100 libsvtav1
      DURATION        : 00:10:57.403000000
  Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp
    Metadata:
      ENCODER         : Lavc60.3.100 libvorbis
      DURATION        : 00:10:57.171000000

ffmpeg -i hd01.mov -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hd01_mov_svt-av1_pr10.webm
...
Guessed Channel Layout for Input Stream #0.1 : hexadecagonal
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hd01.mov':
  Metadata:
    creation_time   : 2016-02-23T23:49:21.000000Z
  Duration: 00:01:11.28, start: 0.000000, bitrate: 200496 kb/s
  Stream #0:0[0x1](eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(bt709, top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : Apple ProRes 422 (HQ)
  Stream #0:1[0x2](eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32 (24 bit), 18432 kb/s (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (prores (native) -> av1 (libsvtav1))
  Stream #0:1 -> #0:1 (pcm_s24le (native) -> vorbis (libvorbis))
Press [q] to stop, [?] for help
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]:    SVT-AV1 Encoder Lib v1.7.0
Svt[info]: SVT [build]  :    GCC 13.2.1 20230912 [revision b96e66fd4ef3e36983969fb8cdd1956f551a074b]     64 bit
Svt[info]: LIB Build date: Nov  3 2023 00:00:00
Svt[info]: -------------------------------------------
Svt[info]: Number of logical cores available: 8
Svt[info]: Number of PPCS 59
Svt[info]: [asm level on system : up to avx2]
Svt[info]: [asm level selected : up to avx2]
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: main profile    tier (auto)    level (auto)
Svt[info]: SVT [config]: width / height / fps numerator / fps denominator         : 1920 / 1080 / 25 / 1
Svt[info]: SVT [config]: bit-depth / color format                     : 10 / YUV420
Svt[info]: SVT [config]: preset / tune / pred struct                     : 10 / PSNR / random access
Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type             : 161 / 16 / key frame
Svt[info]: SVT [config]: BRC mode / rate factor                     : CRF / 35
Svt[info]: -------------------------------------------
Output #0, webm, to 'hd01_mov_svt-av1_pr10.webm':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0(eng): Video: av1, yuv420p10le(tv, bt709, top coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : Lavc60.3.100 libsvtav1
  Stream #0:1(eng): Audio: vorbis, 48000 Hz, hexadecagonal, fltp (default)
    Metadata:
      creation_time   : 2016-02-23T23:49:21.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.3.100 libvorbis
frame= 1781 fps= 51 q=35.0 Lsize=   19732kB time=00:01:11.26 bitrate=2268.3kbits/s speed=2.03x     
video:18635kB audio:1059kB subtitle:0kB other streams:0kB global headers:3kB muxing overhead: 0.193378%