How you connect it depends on your system. You need to connect the video out of the recorder to the TV. If you want to record programs, you need to connect the cable box to the recorder's video in. (The unit doesn't have a tuner if you have the unit listed above.)
Place the IR Blaster near the set-top box IR receiver. Connect the RF cable from the wall to your set-top box and then another RF cable from the set-top box to the TV (not to the DVD recorder). Connect a composite A/V cable from the set-top box A/V (composite) out to the DVD recorder's A/V in (AV1) port. (Composite video is a three wire cable - the plugs are yellow (video) and red/white (R/L audio).)
Next you need to connect the unit to the TV. Depending on the TV, you can use an HDMI cable (best results), component video or another composite video cable (labeled AV2 AV out). If you use component video, you'll need a separate cable to carry the audio. (Component video cables have 3 RCA jacks on each end (red, blue and green). The audio cable has the red and white plugs.
You will only get a 480 (SD) signal output if you use anything other than the HDMI cable. (The progressive scan feature is not compatible with all TVs; see the manual for details.)
You can obtain the manual from http://www.samsung.com/us/support/detail/supportPrdDetail.do?menu=SP01&prd_mdl_name=DVD-VR375
I hope this helps.
(you have an additional A/V IN connection as well as a DV In port on the front of the unit)