I need brand names of system that can do this jobs conveniently

any system that has core i5 cpu would run smoothly, it is more easier if you render always as you edit than to pile it all red especially if you use adobe premiere pro

Solar system

always grab an external hard drive to go with the laptop.

On the processor front, the laptop is bundled with a powerful 7th generation Intel Core i7, Core i5, or Core i3 processors which promises to deliver the best performance. Standing at 14 inches tall, the Intel HD Graphics card makes visual rendering a pleasure to behold. The laptop comes with a webcam that can shoot 720p HD quality videos and as well, a DTS Audio sound system. Did we mention that there is a fingerprint reader somewhere in there?

HP Probook 440 G4 is one of the best laptops to consider. You get an option of touchscreen display and the 15.5 hours battery life posted by HP is very impressive. Price starts at around 230,000 Naira

You can start with a laptop with 8gig ram, 500gig/1terabyte...1gig/2gig dedicated...core i5 or 7..
Dell or HP is better...if u get money wella buy apple.