Ok, well in that case I suggest you should care about the money.
Contact customer support and find out what they say. It may be a stolen card or something like that in which case they cannot do anything.
If it was a chargeback because they say they didnt get what they ordered then CS actually can do something, I have read about others getting chargebacks reversed and getting their money. In this case the vendor (Fiverr) has to respond to Paypal within 30 days and dispute the chargeback with evidence of delivery. You can do this with screenshots of the orders, your conversations with the buyer, reviews they left, screenshot of the video on youtube etc. Obviously this can take time so establish what type of chargeback it was first before doing that!
When the evidence is submitted then Paypal will check the case from both sides and make a ruling. They act quickly and effectively, I have had chargebacks outside of Fiverr and Paypal always found in my favor except for one which was a stolen card.
Be clear in your communication with CS and be patient with them. When you have submitted everything to them, ask if there is anything else they need. You may not be successful but you will be giving yourself the best chance by doing this.