It's a format that is used by Youtube AND Vimeo, so I would say it's ridiculous that it doesn't work when I try to use downloads from these platforms in a project?

Beware of re-using copyrighted footage from Youtube in your own projects. I recently heard about a person who was charged for several 100k Euros for using Youtube footage in his own Youtube uploads...

Hi there, I see what you mean, but I was downloading our own projects from youtube to make a compilation of interviews. That would have been much faster, but I had to search for the MP4 originals on my harddrive after all because of this issue... ;)

I would always use the originals for a compilation and not the twice re-rendered youtube downloads and than re-render twice for the next youtube upload...quality will suffer.

Btw, when I use 4k Video Downloader for downloading your Youtube content, the resulting file is an mp4 an can be imported in Vegas without issues...

General
Complete name                            : C:\Users\theoh\Downloads\Anouska Parkinson, zenuwpijn en migraine.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 70.6 MiB
Duration                                 : 2 min 45 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 3 571 kb/s
Movie name                               : Anouska: Parkinson, zenuwpijn en migraine
Writing application                      : Lavf58.29.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 3 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 3 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 2 min 45 s
Bit rate                                 : 3 436 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.055
Stream size                              : 68.0 MiB (96%)
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 2 min 45 s
Bit rate mode                            : Variable
Bit rate                                 : 128 kb/s
Maximum bit rate                         : 130 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 2.53 MiB (4%)
Default                                  : Yes
Alternate group                          : 1

Thanks for this comment, I didn't think of this before, but I was able to change the default setting in 4k Video Downloader from 'auto' to MP4, so next time it will not be a problem!

I always assumed that MKV was just the format that Youtube and Vimeo use, but thats not the case, the downloader can create both! ;)

As far as the quality is concerned, you are absolutely right, but the compilations I make are only for using them in a livestream, which has a terrible quality anyway, most of the time I'm happy already if it's not lagging and you can actually see faces in the videos... :))

Marcel