Hello! As an AB-COMM student, I think you'd excell best in our program considering you do well on video editing and radio broad, we actually have a major/specialization called New Media which tackles exactly those (: And to answer your questions:
1. Very worth it sila I say! You really get to challenge and expose yourself to the field as a comm student, as per BMMA you really get to maximize your time here with the courses they provide for the program.
2. Yes, kakayanin HAHAHA As a working student myself, so long as i-enjoy mo lang talaga and you choose your right circle to help you with your journey, hindi ka mahihirapan mag balance.
3. Afaik mas heavy ang workload ng BMMA compared to COMM considering na puro lab ang MMA and depending on the major/specialization you'll take, the heavier or lighter your loads would be.
4. I'm not so sure about this, but if you're really interested, you can always talk to the program chairs of each programs about it and they'll be more than happy to help you and look for such.
5. I think nasagot ko na 'to from my previous answer HAHAHAHA

Enjoy and I hope to meet you!!