There are many tricks people apply to make their musical.ly video look better and more entertaining, but if you want to keep getting high musically likes on all of them, to be consistent. Be consistent in the number of posts you make a day and the types of videos you make. Consistency is a key thing in almost all social media networks. Look at some of the most followed people on twitter and check how many tweets they send per day. Most probably it will be a constant figure.
Similarly on musical.ly, where you are in dire need of many musically likes and fans in your first few weeks, being consistent on number of posts and what you post is a must. Post about five posts a day throughout the week share them on your other social media networks and keep improving on quality day by day. If you can’t afford the time to make many video clips in one day, make many clips in a single day and then release them gradually as the week moves on. You may change clothes or make up to reduce monotony in your videos.