Electronics Repair Questions? Ask an Electronics Technician
Here is a link to the manual for the Sanyo unit you have. Without knowing exactly what Comcast has going on, it would not be worth trying to split of eliminate any of these cables. The only one you want to move, is the antenna cable going straight into the TV. Move this to the ANT input of the Sanyo Player. Then also connect another coaxial cable from the Sanyo's ANT Out to the TV's ANT IN jack. Then simply run a set of Yellow, Red and White RCA cables from the Output of the DVD/VCR to the Inputs of the same color on the TV.
If this answers your question, please click "Accept". Tips and Bonuses are welcome and appreciated!!