I'm a beginner in guitar playing. I come across this type of accompaniment (specifically the rhythm on the right hand) frequently in songs and really like it but don't know what it's called to search for tutorials. Can I get help to point me in the right direction? Thanks.
There are a few things he's doing with the rhythm. I'm not sure if there's a name for the whole effect, though.
The slaps happen on beats 2 and 4, constituting a backbeat.
There's a chord on beat 1 and a staccato chord on the last 16th note of beat one. This is sometimes called an anticipation.
The bass thumps are on the last 2 16ths of beat 2, stopping just before beat 3 which would normally be the second strongest beat after beat 1. This could be considered a syncopation, having a rest where you would expect a note. You can kind of feel a beat here even though you don't hear anything.
If you mean the rhythmic accompaniment of the right hand:
On certain beats, instead of a full strum of the strings, we mute all the strings with our strumming hand, and simply run the pick across the dead strings, creating a "blip" kind of sound. This sound creates a very pleasing rhythmic contrast to the rest of the strums, which carry a full tone. The key to its effectiveness is that it is creating an accent on the beat it falls on.
It is called the slap strum.
But there may be different names like this link shows:
Searching for "slap strum" you will find plenty of tutorials.