It may be sign of teething also
Check if baby gums are swollen ,drooling and irritating... Trying to chew everything this are the symptoms of teething
If so massage and clean baby gums with soft silicone finger toothbrush
Give frozened carrot and give teethers which are BPA free like Buddsbuddy

U can watch tv, but at same time u need some rest

Stop him watching tv for some days and check if it continues. Otherwise consult a doctor.

Do you have a second child ? If yes thenay be she feels that the second child is getting more attention that could be a reason for her to behave in that manner. Try to make her feel that you love her too. Try to spend time with her. Give her treats.

Give her pencil and paper..toys..show baby outside

Please stop giving smart phone or laptop to baby. That radiation makes baby hyper. They affect radiation more than adults. This is the main reason I think. ND divert him some entertainment.. Be always soft to them.

It's not ok that would affect her delicate eyes.

Try to sing for him and keep phone away my lo also do the same I sing for him bingo, twinkle twinkle and many other songs it really helps me but sometimes only☺

If yu have doubt thn cconsult it wit doc....

No will not effect much...actually tv and its scenes are colourful so they look towards that...But they will soon lose interest