The EuroLine 6642M is a very low profile DVD player, it is only about 5 cm (2") high! It also has somewhat "newer" hardware compared to the 6620/6650 / 6632/6652 players.
The EuroLine 6642M can play the following formats:
I have tested the 6642M with CD-R, CD-RW, DVD-R, DVD-RW and DVD+RW and it has been able to play all of them! However, it is possible that the player may have problems with certain brands of R/RW discs, but I have no information about this. (I do not have any DVD+R to test with, so if you have the possibility to make a Video-DVD on a DVD+R disc, I am very interested in buying one from you).
Even though there is nothing mentioned about the 6642M being able to play VCD/SVCD, I have not yet heard of a 6642M that cannot play VCD/SVCD.
The 6642M has no built-in DolbyDigital decoder, and no built-in DTS decoder. So the only way of getting DD/DTS sound from this player is to connect it via the coaxial or optical digital output to an external DD/DTS-decoder.
The 6642M is able to downmix Dolby Digital 5.1 sound to 2 channel stereo that can be listened to via the analog audio outputs on the back of the player. However, it cannot downmix DTS sound to 2 channel stereo.
It is possible to make the 6642M region free or to set a specific region number, look at the Hacks page for information about how to do this.
Another thing that has been added to the 6642M is the possibility to choose between RGB and Composite video output on the SCART socket.