The filter syntax is a work in progress. You're essentially writing the where clause in a SQL statement (using DuckDB SQL).
Here's some you can try:
usg_pct > 26 and fga > 80
team in ('BOS', 'MIA', 'BRK') and fga > 30
team = 'BOS'
quantile(fga) > 80 or quantile(trb) > 80
pts_per_g > 20
fg3a_per_g > 5 and quantile(fg3a) > 75
quantile(stl) > 75 and quantile(ast) > 75 or name like '%Thybulle'
name SIMILAR TO '.*(Tatum|Giannis|Durant|Embiid|Harden|Towns).*'