Hi livo74
What settings ar you using to export your project? They can make quite a difference to the exported file size
Using an original MPEG4 clip 1920 x 1080p H264 30fps the size on disc is 55.96 Mb Duration in VP of 33 seconds
Exporting this as .mp4 H264 HQ 1920 x 1080p 30 fps gives a file size of 54.0 Mb. So virtually no change and the export was a matter of seconds.
Exporting it as .mp4 MPEG4 HQ 1920 x 1080p 30fps gives a file size of 97.8 Mb.......almost double but visually no difference with the first export or original.
Exporting as an .avi HQ MPEG4(Native) 1920 x 1080p 30fps gave a file size of 95.6 Mb but took longer to export
Exporting as a wmv file Best quality (100) 1920 x 1080p 30fps gave a file size of 32.5 MB but took a long time to export.
All these exports gave a similar quality image.
Choosing the custom YouTube .mp4 1920 x 1080p H264 29.97fps export settings the file size was 54.0 Mb with fast export..same as the export 2 above..
The speed of export of course depends on the PC...Mine is an old slower Vista machine.
Is this any help?
Nat