Make sure to follow these rules before launching your campaign to not land in spam and ruin your results:
Email inboxes need to warm up AT LEAST 2 weeks.
If you use Instantly, make sure that the Health Score of the inboxes never fall below 97%. If they do, don't use them in campaigns and let them warm up so they reach above 97% until you use them again.
Never send the videos in the first email.
Unless you have set up an advanced infrastructure and keep the sending limits extremely low, to do this correctly you need to be 100% sure on how to do this.
Keep your overall sending limits low:
<10 Campaign email / inbox / day
20 Warmup emails / inbox / day
Maximum 4 inboxes per domain
Never send videos in the first email
Only prospects with verified inboxes
Have robust warmup settings: (example below is based on Instantly.ai's settings)
Increase per day = 1
Daily warmup limit = 20
Reply rate % = 35%
Weekdays only = Disable
Read emulation = Enable
Open Rate = 85%
Spam Protection = 100%
Mark Important = 20%