Is there any option to do that or maybe some plugins? I know how to slow down the whole video but I don't know how to make video slowly slowing down at the end. Somebody help.
Use a Velocity envelope.
Right click on the video event, select Insert/Remove Envelope and then check Velocity (as per Dot). On the green line created on the video event, double click on the green line to create a node point where you want to start the 'slow down' - the node point will be at 100% unless you change it. Then select a later point to create an out node point. Right click on that node point and the resulting window will provide a number of reduced or increased velocity choices - it also has a 'Set To…' selection so that you can code in your own custom velocity if none of the presets suits.
Dexcon has it in one, plus you’d need to pull out the End of the Event to reflect that’s it’s got longer due to slowing it down.
Great explanation by Dexcon, and timtowtdi, but you are better off doing this stuff in Twixtor, which uses advanced frame interpolation.
A good (and cheaper) alternative to twixtor is prodad's ReSpeedr
@SkyyOfficial Excellent Magix tutorial ... https://vegas-magazine.com/velocity-envelope/