Is the CCTV inside the apartment or outside? If outside, is there a power socket to power the CCTV?
Similarly I plan to install a CCTV in the apartment, though a cheap one such as the Xiaomi Dafang. However, I was thinking that even though there are all these security measures in place, the thief or burglar may have got smarter throughout the years with all these technological advancements. Even though there is a CCTV, the intruder may wear a face mask and for this reason people may not be able to identify the culprit. I have received few Whatsapp videos from friends and some of the break-ins captured by videos, the intruders were wearing a mask or a cloth to cover the face.
Similarly I am in agreement with few comments on iron grille. It is surely true that the padlock, I mean any padlocks low-end or high-end can be easily opened by a locksmith in several seconds. Few years ago I hired a locksmith to open a padlock and to my amazement he opened it in a blink of an eye, probably in less than 5 seconds. It's like child play to him. Seeing him unlock the padlock just makes me wonder the man can enter through any locked gates without any problem. Though he is earning a living but with the skills he possesses, he can have access to basically any home if he has bad intentions.
Now coming back to this iron grille. If the main door iron grille and padlocks are breached by the intruder, the second tier would be the CCTV and most importantly alarm. Personally I think CCTV is important but it is just a tool to record videos. That's all. It will likely not prevent the thief from carrying out his work. However, the alarm will surely cause some panic and somehow disrupt the activity. Better still if the alarm is connected to the main security system of the condominium or apartment so that the security guards will be alerted once the alarm goes off, but this connected system is usually available only in high-end condo or apartment.
In summary, it is clear from this thread that iron grille is necessary for high floor condo units, not only for break-ins but to prevent a young child from falling 10 or 20 storeys down. The second point is if the 1st tier security in iron grille at the main door or pad locks are breached, the 2nd tier security which I believe is the last tier will be the CCTV + Alarm.
Yes outside. At least you need power. Then you can even opt for IP camera.